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`20231
`THE COMMISSIONER FOR PATENTS, Washington, D.C.
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`IN THE L.LTED STATES PATENT AND TRADEMARK OFFICE
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`In re Application of
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`Group Art Unit
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`Filed: CONCURRENTLY
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`Title: ANTI-THEFT PROTECTION FOR A RADIOTELEPHONY DEVICE
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`future be required in this application,
`including extension of time
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`fees, but excluding the issue fee unless explicitly requested to do
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`so, and credit any overpayment,
`to Deposit Account No. 14—1270.
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` ichael E.
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`arion, Reg. 32,266
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`Attorney
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`(914) 333—9641
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`\\SERVERO\SY82\WPDOCS\SL\MBl3SLEO.MAO.doc
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`PHF 99.624
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`Anti-theft protection for a radiotelephony device
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`1
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`01.12.2000
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`DESCRIPTION
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`FIELD OF THE INVENTION
`The invention relattis to a mobile radiotelephony device intended for
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`accommodating a user identificati . module, said device comprising:
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`connecting means for establishi g a link between the device and the identification module
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`- blocking means for preventing th normal operation of the device,
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`mounted inside the device,
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`— test means for activating the bloc ng means when the identification module mounted
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`inside the device is not the one that 's linked to the device.
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`The invention also relates to a method of protecting such a device, and a
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`computer program for implementing such a method.
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`The invention notably has applications in the field of portable radiotelephony.
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`Portable radiotelephony devices are intended to accompany their users when they move
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`around. It happens that these devices are lost or stolen.
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`PRIOR ART OF THE INVENTION
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`United States patent 5,913,175, published 15 June 1999 describes a method of
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`protecting a radiotelephone which permits to avoid that the lost or stolen telephone can be
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`used by a third party with another user identification module. This method comprises
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`establishing a link between the device and a specific user identification module and blocking
`the normal operation of the device when the user identification module that is placed inside
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`the device is not the one that is linked to the device.
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`When the device is lost or stolen with the identification module to which it is
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`linked, the user is to warn the operator so that the use of his identification module is blocked
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`at network level.
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`This means that the device can be freely used until the identification module to
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`which it is linked is blocked via the network. This may take a certain period of time.
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`PHF 99.624
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`2
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`01.12.2000
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`SUMMARY OF THE INVENTION
`It is notably an objeét of the invention to resolve this problem. For this
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`purpose, a device in accordance with‘the invention and as described in the opening paragraph
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`is characterized in that it comprises:
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`— timing means for activating the bloc ing means after the device has been inactive for a
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`defined period of time,
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`— and deblocking means for permitting no
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`identification module placed inside the device is the one that is linked to the device and
`when a deblocking code is supplied by the\.\lser.
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`Thus, when the device falls into the hands of a third party together with the
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`identification module to which it is linked, it has most probably been inactive for a period of
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`al operation of the device when the
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`time that is sufficiently long for its normal operation to be blocked (advantageously, the
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`inactive time after which the blocking means are activated is of the order of several minutes).
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`The device cannot thus be used without the deblocking code being supplied.
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`Thanks to the invention the lost or stolen device becomes totally unusable. A
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`fraudulent person cannot send communications at the cost of the owner of the device. But
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`neither can he use the device with another identification module. The theft of the device
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`becomes totally useless. The invention thus forms a protection against theft.
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`In a particularly simple embodiment, the connecting means comprise reading
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`20 meansand storage means of a data stored in the identification module, and the test means
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`compare the thus stored data with the data stored in the identification module which is places
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`inside the device. The data stored is formed, for example, by the international identification
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`number IMSI which is contained in the identification module (compare standards relating to
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`the GSM radiotelephony systems). Thus, the identification module is automatically linked to
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`the device without the intervention of the user, more particularly without the fact that a
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`specific code has to be entered.
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`Advantageously the deblocking code, which is to be supplied to return to the
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`normal operating mode, is formed by the pin code (Personal Identity Number) which is
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`contained in the identification module (compare standards relating to the GSM
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`radiotelephony systems). Thus the user need not store an additional code to ensure the
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`protection of his device.
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`PHF 99.624
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`3
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`01.12.2000
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`BRIEF DESCRIPTION OF THE DRAWINGS
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`These and other aspects of the invention are apparent from and will be
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`elucidated, by way of non-limitative example, with reference to the embodiment(s) described
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`hereinafter.
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`In the drawings:
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`Fig. 1 represents a device in accordance with the invention,
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`Fig. 2 represents an overall electric diagram of the device of Fig. 1, and
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`Fig. 3 represents a flow chart explaining the operation of the device of Fig. 1.
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`DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION
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`In Fig. l is represented an electronic device in accordance with the invention.
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`In the example described here this device is a portable radiotelephone of the type used in
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`cellular systems. It notably comprises a microphone 5, a loudspeaker 6, a screen 8, a keypad
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`9 and an antenna 1 1. The device 1 also comprises a housing 12 intended for accommodating
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`a user identification module 13. In the example of embodiment described here, this
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`identification module 13 is a portable card of an integrated circuit in which information is
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`stored, notably an international identification number currently called IMSI number, and a
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`Personal Identification Number currently called PIN code.
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`1 electrical diagram of this device. The operation of the
`icroprocessor assembly 20 which comprises a
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`Fig. 2 shows the ove
`device is, in essence, controlled by a
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`microprocessor 22 to which are assoc ted a random access memory 24 and aread-only
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`memOry 26. This assembly is connecte to a man-machine interface 30 via a common line
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`32. This man-machine interface 32 con
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`32 also connects the microprocessor asse bly 20 to a transceiver assembly 35 via an
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`interface circuit 38. The transceiver assem ly is connected to the antenna 11. Finally, the
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`common line 32 also connects the micropro essor assembly 20 to a card reader 39.
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`In Fig. 3 is represented a function flow chart of a device in accordance with
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`the invention. This flow chart starts at box K1. In box K1 the device is in a state of
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`availability, that is to say that the user has access to all the functions of the device. The user
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`has the choice of either or not locking his device. This locking (L)/unlocking (UL) is done by
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`accessing a configuration menu of the device. When the user locks his device (box K2), the
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`identification module that is inside the device is automatically linked to the device. For this
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`purpose, the device starts reading a data D1 in the identification module (for example, the
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`PHF 99.624
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`4
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`01.12.2000
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`international identification number IMSI) and he stores it in the random-access memory 24.
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`Once locked, the device remains in the state of availability indicated in box K1. When the
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`device is in the state of availability, one looks whether it is locked (box K3). If it is not
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`locked (arrow N3), the device remains in the state of availability indicated in box K1. If it is
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`locked (arrow Y3), one looks whether the identification module which is placed inside the
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`device is the one that is linked to the device (box K4).
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`If the identification module, which is placed inside the device, is not the one
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`that is linked to the device (arrow N4), the device goes to a first blocking state indicated in
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`box K5. In this first blocking state, the device is disconnected from the network. Thus it can
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`no longer receive an incoming call nor transmit an outgoing call (possibly with the exception
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`of emergency numbers). In the blocking state K5, the screen shows a message inviting the
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`user to insert the proper module into the device. And when the user inserts a new module,
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`one looks whether this new identification module is the one that is connected to the device
`(box K7). If this is the case (arrow Y7), the device is reconnected to the network in
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`accordance with the normal procedure (box K8) and then the device returns to the state of
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`availability indicated in box K1. If not (arrow N7), the operation is resumed in box K5. The
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`only way of leaving this first blocking state is thus to place the identification module that is
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`linked to the device inside the device.
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`If the identification module that is placed inside the device is linked to the
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`device (arrow Y4), one looks whether the device has remained in the state of availability for
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`a certain period of time T of the order of several minutes, for example (box K10). If this is
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`not the case (arrow N10), the device remains in the state of availability indicated in box K1.
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`If this is the case (arrow Y10), the device passes on to a second blocking state indicated in
`box K11 by passing through an initialization step K12 which permits to initialize a variable A
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`which represents the number of attempts made at supplying a deblocking code (for example,
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`the Personal Identification Number) PIN.
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`In this second blocking state the device only processes incoming calls (box
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`K13) and, possibly, the outgoing calls that correspond to emergency numbers (box K14).
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`Once these calls have been processed, the device goes back to the second blocking state
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`indicated in box K11. In the second blocking state K11 a message inviting the user to supply
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`a deblocking code is displayed on the screen. If the code taken by the user is recognized
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`(arrow Y] 1), the device goes back to the state of availability indicated in box Kl. If it is not
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`recognized (arrow N11), the value of the variable A is tested (box K15). If this value is lower
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`than a certain figure (for example 3), the value of A is augmented by unity (box K16) and a
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`PHF 99.624
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`5
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`01.12.2000
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`message is displayed on the screen to indicate the user that the code is not valid (box K17).
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`Then the device goes back to the second blocking state indicated in box K11. If the variable
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`A is higher than or equal to said figure, the test of box K15 causes the total blocking of the
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`device indicated in box K30. To leave this third blocking state it is necessary to contact the
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`organization that provides the identification module. One is then again in the state of
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`availability Kl.
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`In another embodiment of the invention, when the user locks the telephone,
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`the device asks for the user's name. The name given by the user is stored in the random
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`access memory 24 of the device. When the identification module that is inside the device is
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`not the one that is linked to the device, the device displays the name of the user before asking
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`him to insert his identification module as indicated in box K5. The device also displays the
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`name of the user before asking him to supply his personal code as indicated in box K1 1.
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`The embodiment that has just been described is particularly effective, because
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`it provides two separate blocking modes depending on whether the identification module that
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`is placed inside the device is either or not linked to the device. The first blocking mode is
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`applied in the case where the device has been lost or stolen. The object is then to prevent the
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`device being usable with another identification module. It thus advantageously blocks the
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`incoming and outgoing calls at the same time. The second blocking mode is applied in the
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`case where the identification module that is linked to the device is in its place inside the
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`device and the device is in a state of availability. The object is to prevent a third party being
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`able to send outgoing calls with this device if it is lost, stolen or left without attendance for
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`some time. In that case, it is desirable for the user to be able to continue to directly receive
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`his incoming calls.
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`In another embodiment the same blocking means are used as the identification
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`module which is placed inside the device either or not linked to the device, for example, the
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`second blocking means. In that case it is possible for receiving incoming calls intended for
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`the identification module that is inside the device, even when this identification module
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`placed inside the device is not linked to the device.
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`PHF 99.624
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`:
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`CLAIMS:
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`6
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`01.12.2000
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`~
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`1.
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`A mobile radiotelephony device intended for accommodating a user
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`identification module, said device comprising:
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`- connecting means for establishing\a link between the device and the identification module
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`‘..
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`mounted inside the device,
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`— blocking means for preventing the normal operation of the device,
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`test means for activating the blocking ineans when the identification module mounted
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`inside the device is not the one that is liipmd to the device,
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`characterized in that it comprises:
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`— timing means for activating the blocking
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`eans after the device has been inactive for a
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`10‘
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`l:
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`identification module placed inside the device '3 the one that is linked to the device and
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`‘ V when a deblocking code is supplied by the user.\
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`A device as claimed in claim 1, charac rized in that said blocking means
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`rrrrr
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`ission and reception of calls when the
`comprise first blocking means for preventing the trans
`identification module placed inside the device is not the ne that is linked to the device, and
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`second blocking means for preventing the sending of call. after a defined period of time
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`during which the device has been inactive, with the excep 'on of one or various emergency
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`numbers.
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`3.
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`A device as claimed in claim 1, characterized i
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`that it comprises
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`locking/unlocking means for locking/unlocking the device, w 16 said blocking means can
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`only be activated when the device is locked, and said link is est blished while the device is
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`being locked.
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`4.
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`A device as claimed in claim 1, characterized in that said connecting means
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`comprise means for reading and storing a data stored in the identific tion module, and in that
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`Page 12 of 175
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`PHF 99.624
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`said test means compare this data thus stored with the data stored in the identification module
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`7
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`01.12.2000
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`that is placed inside the device.
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`5.
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`A device as claimed in claim 3, characterized in that said data is formed by the
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`6.
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`A device as claimed in
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`aim 1, characterized in that said deblocking code is
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`— blocking the normal operation of the
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`vice when the identification module placed inside
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`the device is not the one that is linked o the device,
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`characterized in that it comprises the follo ing steps:
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`— detection of a period of inactivity of the device,
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`detected,
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`— blocking of the normal operation of the device when said period of inactivity has been
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`— deblocking which permits the normal ope‘iiation ofthe device when the identification
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`module placed inside the device is the one\that is linked to the device and when a
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`deblocking code has been supplied by the user.
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`8.
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`A method as claimed in claim 6
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`protecting a mobile radiotelephony device,
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`characterized in that it comprises a step of lockin the device, while the blocking steps can
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`only be executed when the device is locked, and t 6 step of establishing a link between the
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`device and the identification module placed inside the device is executed when the device is
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`locked.
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`9.
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`A method as claimed in claim 6 of pr tecting a mobile radiotelephony device,
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`characterized in that the step of establishing a link be ween the device and the identification
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`module placed inside the device comprises a step of r ading and storing a data stored in said
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`Page 13 of 175
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`Page 13 of 175
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`international identification number stoked in the user identification module.
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`her stored in the identification module.
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`formed by the personal identification 11'
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`: i
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`10 1/ .
`A method ofprotecting aimobile radiotelephony device intended for
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`accommodating a user identification mo‘dule, said method comprising the following steps:
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`— setting up a link between the device and the identification module placed inside the
`ifiif‘;
`Q
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`131%)”0
`device,
`3
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`— testing to verify whether the identification module placed inside the device is the one that
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`is linked to the device,
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`Page 13 of 175
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`Page 13 of 175
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`PHF 99.624
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`
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`8
`01.12.2000
`\.
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`identification module, and in that the test step comprises comparing the data thus stored with
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`’\
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`the data stored in the identification module that is placed inside the device.
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`10.
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