United States Patent
`
`[19]
`
`[11] Patent Number:
`
`5,528,304
`
`Cherrick et al.
`
`A
`
`[45] Date of Patent:
`
`Jun. 18, 1996
`
`US005528304A
`
`[54] PICTURE-IN-PICTURE FEEDBACK FOR
`CHANNEL RELATED FEATURES
`Inventors: S01 M. Cherrick, Chicago; Kevin J.
`G3“3h‘“‘» A“1“g‘°“ H°1gh‘5’b°‘h °f
`111-
`
`[75]
`
`A
`
`[73] Assignee:
`
`Iznenith Electronics Corp., Glenview,
`
`[21] Appl‘ No’: 27s’784
`[22]
`Filed:
`Jul, 22, 1994
`
`
`
`H04N 5/445; HO4N 5/45
`Int. Cl.“
`[51]
`[52] U.S. Cl. ........................... .. 348/565; 348/563
`[58] Field of Search ................................... .. 348/563, 564,
`348/565’ 566’ 569’ 570’ 731, 732’ 906;
`H04N 5/445 5/45
`’
`
`[55]
`
`References Cited
`
`U-S- PATENT DOCUMENTS
`12/1986 Nortrup et al.
`......................... 343/559
`348/564
`3/ 1988 I-lakamada et al.
`9/1990 Strubbe etal.
`343/555
`353/133
`2/1991 Yoshino ........
`... .. 348/563
`5/1993 Marouka . .... ..
`3/1995 Duifield et al.
`348/564
`5/1995 Saitoh et al.
`...................... .. 348/588 X
`
`
`
`4,626,892
`4,729,027
`4,959,719
`4,991,012
`5,212,553
`5,398,074
`5,414,471
`
`OTHER PUBLICATIONS
`“Froxsystem Owner's Manual”, Frox, Inc., 1993.
`
`Primary Examiner—Victor R. Kostak
`Assistant Examiner—John W. Miller
`Attorney, Agent, or Finn—Rola.nd W. Norris
`
`[57]
`
`ABSTRACT
`.
`.
`.
`.
`.
`A telev1s1on receiver has a main, or regular, d1splay; a
`picture-in-picture display; and an on-screen menu display
`for adjusting various
`television operating parameters,
`including those which are channel or source related, such as
`- channel labeling, source labeling and on-screen program
`guide operation. When a channel or source related menu is
`“Played f°’ °Pe“‘“°“ °“ °h‘m“°1 °’ 5°“‘°° ‘elated f““°‘
`tions, the channel or source operated upon is displayed in the
`picture—in—picture display and the main display may be
`blanked to present a more legible background for the menu.
`
`7 Claims, 4 Drawing Sheets
`
`30
`
`68
`
`56
`
`PRESS
`SOURCE TO
`CHANGE
`
`CH7
`
`1
`
`Comcast,
`
`FOREIGN PATENT DOCUMENTS
`0376376
`7/1990 European Pat. Oif.
`......... H04N 5/45
`:3: """"""""""
`HO4N 5/445
`Japan ..
`Japan ............................. H04N 5/445
`
`5-235372
`5—3oo445
`
`9/1993
`11/1993
`
`
`
`1
`
`Comcast, Exhibit-1007
`
`

`
`U.S. Patent
`
`Jun. 18,1996
`
`T
`
`Sheet 1 of4
`
`5,528,304
`
`VIDEO
`PROCESSOR
`
`2
`
`

`
`U.S. Patent
`
`Jun. 18, 1996
`
`Sheet 2 of 4
`
`5,528,304
`
`CH.LABELS
`TUNHKSBAND
`AUTO TUNING
`SOURCEID
`CLOCKSET
`CAPHONS
`
`PRESS
`SOURCE TO
`CHANGE
`
`CH7
`
`3
`
`

`
`U.S. Patent
`
`Jun. 13, 1996
`
`Sheet 3 of 4
`
`1
`
`5,528,304
`
`ABC ACTS
`—— A&E
`AMC
`BET BRAV
`CA
`
`QB_S CMTV CNBC
`CBN
`COM CSPN
`CTN
`CTV
`DISC
`E!
`ENC ESPN
`EVVTN
`FAM
`FNN
`FOX
`HBO
`HN
`HSE
`HSN
`
`UFE MAX MEU
`INSP
`MN NBC
`NICK
`NOS
`
`RDS A REQ
`QVC
`PTL
`PLAY
`SCFI SHOW SIN
`TBS
`SC
`TBN TELE
`TLC
`TMC
`TNN
`TNT TRAV
`TSN
`TVA TV\C
`USA
`VC
`VCR
`VH1
`VISN
`VJN MEN WTBS VWSDR
`Y1V
`
`SOURCE
`
`A
`
`LABEL
`
`ANTICABLE 1
`ANTICABLE 2
`VIDEO 1
`VIDEO 2
`S-VIDEO 1
`
`ANTENNA
`CABLE BOX
`VCR
`LASER DISK
`CAMCORDER
`
`70
`
`76
`
`4
`
`

`
`U.S. Patent
`
`Jun. 18, 1996
`
`Sheet 4 of 4
`
`5,528,304
`
`sap
`
`5
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`

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`5,528,304
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`1
`PICTURE-IN-PICTURE FEEDBACK FOR
`CHANNEL RELATED FEATURES
`
`BACKGROUND OF THE INVENTION
`
`1. Field of the Invention
`This invention relates to television receivers and their
`control. The invention is addressed specifically to an
`enhancement of the utility of on-screen menus which can be
`improved with the addition of a P-I—P (picture—in—picture)
`display therewith.
`2. Discussion of the Related Art
`
`In P-I-P displays, as known in the art, a small portion of
`the television-screen is blanked and a picture is superim-
`posed over the blanked area. The P-I-P displays of the prior
`art generally receive their video signal from a tuner other
`than the main tuner of the television receiver which pro-
`duces the main, or large display. The term P-I-P as used
`throughout
`is also meant
`to encompass “picture out of
`picture” (P—O—P) displays.
`In many instances current television receiver operating
`parameters are set up for operation through the use of
`on—screen displays, or menus. For present purposes an
`on-screen display will be considered as a displayed televi-
`sion receiver operating parameter menu through which
`operation on a source-related or charmel-related function is
`accomplished. The operating parameters that act on or
`switch between channels or input signal sources of the TV
`shall be referred to herein as source-related or channel-
`related functions. Such parameters may include: channel
`addition/deletion, channel labeling, and source labeling, as
`further explained below, or “parental control” channel
`blocking or the like. Other instances of menu operation for "
`the TV may include the recently emerging “on-screen pro-
`gram guides” such as “STARSIGHT” (TM) which provide
`for control of channel selection and/or recording from a
`daily program grid, such as seen in FIG. 7.
`Channel addition/deletion provides for the addition to, or
`deletion from, the list of selectable channels by means of an
`operator interface such as a remote control unit (RCU). By
`way of example, the user calls up on the television-screen a
`table of all
`the possible television channel numbers, for
`example in VI-[F and UHF, from 2 to 83. The table is scanned
`using adjustment keys on the RCU. By highlighting the
`charmel number and depressing a selected switch on the
`RCU, the user can delete an undesired channel from the list
`of selectable channels. The deleted channel may be, for
`example, one that has a weak broadcast signal in the area, or
`it may be the channel for a station featuring a foreign
`language not understood by the viewer. The reduction of the
`number of selectable channels from a possible 82 to perhaps
`only 10 channels, for example, facilitates channel selection
`by means of channel up/down control as only the desired
`channels are then tuned in. If a channel becomes desired
`later, it can be added to the list of desired charmels by the
`same process.
`“Channel labeling” is a function which allows the tele-
`vision to display an indication of the source of the program-
`ming, for example, the sources shown in FIG. 5, along with,
`or instead of, the channel number.
`“Source identification” is a function which allows the
`television to display an indication of the source of the video
`signal input to the video display circuitry, for example, the
`source identifiers listed in FIG. 6, along with, or instead of,
`the input jack designation through which the signal source is
`input to the television.
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`The convenience of the above-cited features may be‘
`vitiated by the fact that the viewer, after selecting a menu
`from which the channels or signal sources may be operated
`upon, may have to use the RCU to call up the television
`picture to ascertain the nature of that particular channel or
`source, after which the viewer must again revert to the menu
`function in order to operate upon the channel or signal
`source parameters. Further,
`the known menus of these
`channel or source related functions are sometimes trouble-
`some because they are overlaid on an active channel, or
`main screen, display which is the regular television display
`intended to fill the whole television screen. The menu may
`thereby obscure portions of the main screen display. The
`main screen display also could provide a background which
`makes the menus hard to see, especially where the active
`channel signal is weak or blank, thereby causing an unstable
`picture.
`It is, therefore, an object of the invention to enhance the
`utility of such menu driven channel or source related ftmc-
`tions through use of the P-I-P display in a television receiver.
`It is another object of the invention to facilitate the addition
`or deletion of selectable broadcast channels from the tele-
`vision receiver, the labeling of channels, the identification of
`the source of the signals delivered to the television receiver,
`and the use of on-screen programming guides, all through
`the use of the P-I-P display.
`Other attendant advantages will be more readily appreci-
`ated as the invention becomes better understood by refer-
`ence to the following detailed description and compared in
`connection with the accompanying drawings in which like
`reference numerals designate like parts throughout the fig-
`ures. It will be appreciated that
`the drawings may be
`exaggerated for explanatory purposes.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`FIG. 1 is a simplified block diagram of a color television
`display system according to the present invention.
`FIG. 2 is a simplified depiction of a remote control unit
`(RCU) used in conjunction with the present invention.
`FIG. 3 is a television picture depicting five icons, each of
`which represents a category for television parameter adjust-
`ments, and an adjacent list of “set-up” menus for television
`receiver operation.
`FIG. 4 shows an on-screen menu display of broadcast
`charmels, used in adding or deleting an active channel; with
`a real time P-I-P display according to the invention shown
`in a comer of the screen.
`
`FIG. 5 is an on-screen menu display of channel labels
`which the user can apply to designated ones of the channel
`numbers selected from the on-screen display of FIG. 4; with
`a real time P-I-P display according to the invention shown
`in the comer of the screens.
`
`FIG. 6 shows the menu used in labeling the signal sources,
`along with a depiction of an associated real time P-I-P
`display according to the invention.
`FIG. 7 shows an on-screen programming guide with a
`real-time P-I-P display according to the present invention.
`
`DESCRIPTION OF THE PREFERRED
`EMBODIMENT
`
`there is shown a
`Referring now to FIGS. 1 and 2,
`simplified block diagram of a color television receiver 10
`that includes the circuitry for activating and controlling the
`real time P-I-P display according to the invention. FIG. 1 as
`
`6
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`5,528,304
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`3
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`depicted and described covers only the components of
`interest to the present invention, and excludes details of
`signal processing and other circuits well known in the art.
`Within the television receiver 10, there is a microproces-
`sor 12, sometimes termed a “systems controller” or “micro-
`controller” as these terms define its essential function.
`Within, or connected to, the microprocessor 12 is a memory
`module 13,
`infared (IR) decoder 18, and an on-screen
`display (OSD) generator 50.
`in terms of
`The operation of the microprocessor 12,
`operator input, is controlled by means of a user-operated
`alphanumeric keyboard 14 located on the RCU 16 in a
`known fashion. The commands entered on the keyboard 14
`are transmitted to an IR receiver 17 and decoder 18 in the
`television receiver 10 by way of an infared signal as known
`in the art.
`
`10
`
`15
`
`4
`of the set-up procedures listed, that is, AUTO PROGRAM
`et al. The identity of the channel to which the television
`receiver is presently tuned, e.g.,channel two, is indicated by
`the channel indicator overlay 48.
`The icons 34, and the overlays 46 and 48, are generated
`by the on-screen display, or character, generator 50 upon
`command from the microprocessor 12, which in turn has
`responded to the menu command from the RCU 16. The
`overlays are in color as indicated schematically by the RGB
`control line 52.
`
`.
`
`With reference to the menu list 46, me three operations
`relevant to the preferred embodiment are CH. ADD/DEL
`(adding or deleting a channel), CH LABELS (labeling a
`channel) and SOURCE ID (identifying the source of the
`signal routed to the video display electronics of the televi-
`sion, whether from an antenna, a VCR, laser disc player, or,
`other).
`To add or delete a channel, the user will scan the menulist .
`46 to the CH. ADD/DEL option. The selection is indicated ,
`by a banner 47 which is scrolled up or down to highlight the
`options. This is done by pressing the up/down arrow keys
`24a, 24c. The user then presses the right or left arrow key
`2412, 24d and a channel add/delete menu 56 (FIG. 4) com-
`prising a table of charurels is called up from memory module
`13 and compiled by the on-screen display generator 50 for’
`display on the CRT 51, as depicted in FIG. 4. The channel
`which is presently selected by the tuner 21 for the main
`picture is then applied to the P-I-P circuitry 20 by control of
`the input switch 64. The P-I-P window 60 then displays the
`picture 58 of the broadcast channel to which the television 8
`receiver 10 is presently tuned.
`The main screen display‘ 29 on the television receiver
`screen 30 is blanked. This can be done by switching the
`signal source going to the main screen with input switch 64
`to a nonexistent signal source or ground 65 to create a blank
`screen or such other way as is convenient. In this way, the ‘
`sound from the television speaker 67 is also blanked since
`the audio processor 69 receives its signal from the main
`display line 71 also. Alternatively, or in addition, the speaker
`output may be muted in the audio processor 69 under the
`control of the microprocessor 12. The menupresents the
`channels that are presently active, i.e., selectable for view-
`ing, as highlighted by an overlay of color, a condition
`indicated schematically by the underscoring of the respec-
`tive active channel numbers. Nonactive charmels are dis-
`played in white.
`In the process of adding or deleting a channel, the user I
`scans the channel menu 56 with a cursor 68 which outlines
`and delineates the specific number of the channel to be
`changed, in this case channel '7. The scanning of thecursor
`68 is accomplished by depressing the appropriate one of the
`four arrow keys 24a—24d on the RCU 16.
`As the channel add/delete menu 56 is scanned, the tuner
`21 is adjusted therewith such that the real-time picture of the
`channel identified by the cursor 68 appears in the P-I-P
`window 60. If there is no signal on the channel identified by
`the cursor 68, the user will know it from the fact that there
`will be no picture in the P-I-P window 60. The user can then
`delete the channel by depressing the SOURCE KEY 27 . The
`SOURCE KEY 27 acts as a toggle to also add channels to
`the active list.
`
`.
`
`One benefit of a real-time P-I-P display according to the
`invention derives from the fact there is no need to switch
`back and forth between the channel add/delete menu 56, and
`the television display of the channels. Further, the channel
`add/delete menu 56 is overlaid onto a blank screen rather
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`In controlling the operation of the television receiver 10,
`the microprocessor 12 interprets and processes the user
`commands entered from the RCU 16, and issues commands
`to the components of the television receiver 10; e.g., tuning,
`volume, channel selection, etc., in general, and specifically
`in controlling the functions according to the invention.
`A video processor 31 in the television receiver 10 receives
`and processes the television signal and sends it to video
`output circuitry 19 which in turn drives a CRT 51. The video
`processor 31 may contain the P-I-P circuitry 20 and is under
`the control of the microprocessor 12 which in turn controls
`circuits such as the on-screen display generator 50 contained
`therein and the input switching circuit 64 which helps to
`affect the present invention as further explained below.
`Operating controls of the RCU 16 are indicated in the I
`FIG. 2 depiction of the keyboard 14, which include the menu
`key~22, the arrow keys 24a—24d, the numeral keys 0-9 of the
`number pad 26, indicated by the bracket, a source key 27 and
`an enter key 28. The arrow keys 24a—24d are arranged in
`four directions, i.e., up, down, left, and right, 24a, 24c, 24d,
`2422, respectively, and provide for operations such as scan-
`ning a cursor over a menu, as describedbelow. Additionally,
`the left and right arrows 24d, 2422 are dedicated to specific
`adjustments, as will be described. I
`It is to be noted that the use of the invention is not limited
`to these particular control designations, as any of the many
`controls typically on an RCU keyboard could as well be
`programmed to control the inventive functions, as would be
`understood by the artisan of ordinaryskill.
`Referring also to FIG. 3, access to the menus for selecting
`the signal source, setting up the receiver 10, andadjusting
`other television parameters is gained by depressing the menu ,
`50
`key 22 on the RCU 16. The normal television picture, or
`main screen. display, 29 is then overlaid with a banner of
`adjustment icons 34 across the top of the screen. The icons
`34 are identified from left to right’ as follows: source icon 36,
`set-up icon 38, audio icon 40, video icon 42, and P-I-P icon
`44. An icon 34 is selected by sequentially depressing the
`menu key 22 which, operating in a “wrap-around” mode,
`successively scans or highlights the icons 34 indicating
`selection. A pull down list of menus 46 appears when the
`icon is selected. In FIG. 3 the set-up icon 38 is indicated by
`a double border as, having been highlighted or selected.
`The sequence of television operation illustrative of the
`present’ invention is as follows: the menu key 22 is pressed
`and the icons 34 appear, superimposed on the television
`picture 29. The set-up icon 38 is selected by scanning the
`icons 34 with the menu key 22. Upon selection of the icon.
`the list of menus 46 appears, also overlaying the normal
`television picture 29. The menu list 46 provides for selection
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`than an active picture in order to improve legibility of the
`menu while retaining full picture viewing capability.
`In certain instances it may be desirable to label a tuner
`channel number with the programming source found at that
`tuned frequency. For example, where cable TV and terres-
`trial broadcast TV channel designations do not match, the
`operator may wish to label the cable channels with the
`source as further explained below.
`To label a charmel, starting from the menu list 46 of FIG.
`3, the banner 47 is scarmed to CH. LABELS by depressing
`the down arrow key 24c. The left or right arrow key 2417, 24d
`is then depressed. The menu depicted in FIG. 5 is called up
`from the memory module 13 as per above, and a list of labels
`70 from which to make a selection is shown. The tuner 21
`is also routed to the P-I-P circuitry and the main screen 32
`is blanked as per above. If a channel, denominated X, is a
`CBS channel and is to be so labeled, the television tuner 21
`is set to channel X, as indicated, and the active television
`picture of channel X appears in the P-I-P window 60. The
`user scans the labels menu 70 to highlight CBS, indicated
`schematically by the underscore, using the arrow keys
`24a—24d of the RCU 16. The charmel label may be auto-
`matically established when the operator moves to the next
`channel number for additional channel labeling by depress-
`ing the menu key, or waiting ten seconds. Thereafter, when-
`ever channel X appears in the charmel indicator overlay 48
`or during a regular television display, it will read “CH X
`CBS”. The menu screen 32 is restored when depressing the
`menu key 22, or waiting the time—out of ten seconds, after
`which the main screen display will appear.
`The television receiver 10 of the present invention may
`have multiple signal sources 63 selectably routed to the
`video processor 31 through the source selection switch 64.
`A list of sources in this example are shown in FIG. 6 as
`comprising ANT/CABLE 1, ANT/CABLE 2, VIDEO 1,
`VIDEO 2, and S-VIDEO 1. These designations actually
`dcnominatc the jack into which the signal source is fed to the
`TV. Accordingly, the operator may wish to label the actual
`source of the signal such as antenna, cable, satellite, VCR,
`etc. in place of the jack designations making the operation
`of the TV when switching between sources more intuitive.
`The “source lD” function is accessed through the set-up
`menu list 46 as shown in FIG. 3 to obtain the function screen
`shown in FIG. 6. The main screen is blanked as per above
`and input switch 64 feeds the selected source to P-I-P
`circuitry 20. Referring to FIG. 6, as the sources 76 listed on
`the source ID menu are scanned by means of four down
`arrow keys 24a, 24c on the RCU 16, a real-time P-I-P
`display 72 of the source signal appears in the P-I-P window
`60 with the input switch 64 changing the signal source to the
`P-I-P circuitry 20. If there is no signal input to the jack
`identified, the P-I-P window 60 will be blank.
`The signal sources can then be labeled by means of the
`right and left arrows 24b, Md. The labeling of the source of
`ANT/CABLE 2 shown in FIG. 5,
`is accomplished by
`depressing the left or right arrow key to call up the signal
`source labels, which appear sequentially in “wrap-around”
`in the highlighted LABEL banner 73. The labels may
`comprise antenna, cable box, VCR, laser disc, camcorder,
`satellite, etc. When the the desired source label appears, the
`left or right arrow is released, and the label is assigned.
`As seen in FIG. 7, an on-screen program guide (OSPG)
`menu 77 lists a segment of a current television program
`listing in a typical graphic format. The OSPG is controlled
`through a separate microprocessor 79 (FIG. 1) as known in
`the art. The operator can cursor through the program listing
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`to highlight a certain program, in this case that of channel
`twenty, in order to learn more about the program, select it for
`recording, etc. In order to enhance the utility of the OSPG
`menu 77 according to the present
`invention, when the
`operator has selected a program listing that corresponds to
`the present time 81, the tuner 21 will be switched to the
`channel highlighted and that signal will be fed to the P-I-P
`circuitry 20 through control of the input switch 64 in order
`that the operator will be able to see the present programming
`in the P-I-P window 60 to further enhance his selection
`criteria. The main screen display is preferably blanked
`although this is not as important to operator ergonomics in
`the present situation as in those previously cited because the
`program listing 77 is a solid field occupying most of the
`screen
`
`While the present invention has been illustrated in con-
`nection with the preferred embodiment, it is not to be limited
`to the particular structure shown because many variations
`thereof will be evident to one skilled in the art and are
`intended to be encompassed in the present invention as set
`forth in the following claims.
`Having thus described the invention, what is claimed is:
`1. A television receiver having:
`A) a picture-in-picture (PIP) display;
`B) a main display;
`C) an on-screen display for the selection of charmel-
`related functions;
`D) means for displaying the on-screen display with a
`channel table of channel choices and with a cursor
`manipulatable to select dilferent channels from the
`channel table; and
`E) means for automatically changing a signal routed to the
`P-I-P display when the cursor of the on-screen display
`is manipulated to a diiferent charmel to thereby display
`the dilferent channel in the P-I-P display concurrently
`with said charmel table.
`2. A television receiver comprising:
`A) means for generating a main display from a main
`display signal;
`B) P-I-P means for generating a picture-in-picture dis-
`play;
`C) means for generating an on-screen menu display with
`a table of charmel choices for the selection of charmel-
`related functions;
`D) means for selecting channels on which the channel-
`related functions operate,
`E) first switch means for blanking the main display when
`said on-screen menu displays are generated;
`F) second switch means for routing the main display
`signal to the P-I-P means such that the main display
`signal
`is generated in the Picture-In-Picture display;
`and
`
`G) means for changing the signal input to the P-I-P means
`in correspondence with a changed selection of channels
`by the means for selecting,
`whereby as a channel is selected from the channel table,
`the selected channel is displayed in the Picture-In-
`Picture display concurrently with the display of the
`charmel table.
`3. A television receiver having:
`A) a main display circuit,
`B) an on-screen menu display circuit,
`C) a picture-in-picture (P-I-P) display circuit;
`D) the on-screen menu display circuit having a table of
`channel choices and a cursor manipulatable to select a
`channel from said table for charmel-related functions;
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`E) switch means for transferring a main display signal to
`the P-I—P display circuit;
`F) a tuner for receiving broadcast signals and selecting the
`main display signal from said broadcast signals; and
`G) tuner control means for changing the broadcast signal
`selected;
`H) means for routing the main display signal from the
`main display circuit to the P-I-P display circuit in
`response to a displaying of the on-screen menu display,
`1) means. for displaying the main display signal in a P-I-P
`display concurrent with the on-scrcen mcnu display,
`and
`
`J) means for operating the tuner control means to change
`the main display signal routed to the P-I—P display
`circuit to accord with the main display signal selected
`by the manipulatablc cursor.
`4. The television receiver according to claim 3 further
`comprising means for blanking the main screen display
`
`8
`when said main display signal is routed from the main
`display circuit to the P-I-P display circuit.
`5. The television receiver according to claim 4 wherein
`the means for blanking further includes an input switch, the
`input switch capable of connecting the main display circuit
`to a nonexistent or grounded signal source.
`V
`_
`6. The television receiver according to claim 3 wherein
`the means for changing the channel signal further includes
`a system controller microprocessor in the television receiver
`which controls the tuner and the on-screen menu display.
`7. The television receiver of claim 3 further comprising
`means for blanking the audio output of the receiver when the
`main display signal is routed from tile main display circuit
`to the P-I—P display circuit.
`‘
`
`*
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`10
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`15
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`*‘
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`*
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`*
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`*
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`*
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`9
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`

`
`UNITED STATES PATENT AND TRADEMARK OFFICE
`
`CERTIFICATE OF CORRECTION
`
`PATENT NO.
`
`: 5,528,304
`
`DATED
`
`:
`
`Jun. 18,1996
`
`INVENTOR(S)
`
`: S01. M. Cherrick, et al
`
`It is certified that error appears in the above-identified patent and that said Letters Patent is hereby
`corrected as shown below:
`‘
`
`Col. 8.
`
`line 15, cancel ‘‘tile’’ and substitute --the—-
`
`"“""“’
`
`Signed and Sealed this
`
`Third Day of September, 1996
`
`£4144 W
`
`BRUCE LEHMAN
`
`Arresting 0fliC5V
`
`Commissioner of Parenlx and Trademark:
`
`10
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`10