PTO/SBrao (11~08)
`Approved for use through 11!:301'2011. 0MB 0651-0035
`U.S. Patent and Trademark Cities: US. DEPARTMENT OF COMMERCE
`Under the Paperwork Reduction Act of 1995. no persons are required to respond to a collection of information unless it displays a valid OMB control number.
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`POWER OF ATTORNEY TO PROSECUTE APPLICATIONS BEFORE THE USPTO
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`37 CFR 3.73 b .
`i hereby appoint:
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`Practitioners associated with the Customer Number:
`OR
`[:| Practitionerts) named below (ifmore than ten patent practitioners are to be named. then a customer number must be used):
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`9629
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`Number
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`as attorney(s) or agent(s) to represent the undersigned before the United States Patent and Trademark Office (USPTO) in connection with
`any and alt patent applications assigned only to the undersigned according to the USPTO assignment records or assignment documents
`attached to this form in accordance with 37 CFR 3.713(1)).
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`Please change the correspondence address for the application identified in the attached statement under 37 CFR 3.73m) 10:
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`The address associated with Customer Number:
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`9629
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`[2'
`OR
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`Individual Name
`Address
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`—_
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`Assignee Name and Address:
`Oil States Energy Services, L.L.C.
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`333 Clay Street
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`Houston, Texas 77002
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`A copy of this form, together with a statement under 37 CFR 3.73(b) (Form PTOiSBiSG or equivalent) is required to be
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`tiled in each application in which this form is used. The statement under 37 CFR 3.73(b) may be completed by one of
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`the practitioners appointed in this form if the appointed practitioner is authorized to act on behalf of the assignee,
`and must identif
`the ap - lication in which this Power of Attorne is to be filed.
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`SIGNATURE of Assignee of Record
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`ose signature and title is supplied below is authorized to act on behalf of the assignee
`A
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`1
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`Signature me.
`Date iZ/ZO ’
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`This collection of information is required by 37 CFR 1.31. 1.32 and 1.33. The information is required to obtain or retain a benefit by the public which is to tile (and
`by the USPTO to process) an application. Confidentiality is governed by 35 U.5.C. 122 and 37 CFR 1.11 and 1.14. This collection is estimated to take 3 minutes
`to complete. including gathering. preparing. and submitting the completed application form to the USPTO. Time will vary depending upon the lndividuat case. Any
`comments on the amount of time you require to complete this form andror suggestions for reducing this burden, should be sent to the Chief Information Oflicor.
`US. Patent and Trademark Office, U.S. Department of Commerce. [3.0. Box 1450. Alexandria, VA 22313-1450. DO NOT SEND FEES OR COMPLETED
`FORMS TO THIS ADDRESS. SEND TO: Commissioner for Patents, P.D. Box 1450, Alexandria, VA 22313-1450.
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`0/
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`PTorAlNee (cc-12)
`Approved for use through 0113119013. OMB 0651-0031
`U.S. Patent and Trademark Office: U.S. DEPARTMENT OF COMMERCE
`Under the Paerwork Reduction Act of 1995, no screens are reached to roe-0nd to a collection of information unless it dis-fa s a valid OMB control number.
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`STATEMENT UNDER 37 CFR 3.7316)
`Oil States Energy Services, L.L.C.
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`Applicant/Patent Owner:
`Filed/Issue Date: January 30' 2001
`Application NoJPatent No.: 6'179'053
`wed, LOCKDOWN MECHANISM FOR WELL TOOLS REQUIRING FIXED-POINT PACKOFF
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`Oil States Energy Services, L.L.C.
`(Name of Assigned)
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`, a corporation
`(Type of Asstgnee. e.g.. corporation, partnership. university, government agency, etc.)
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`states that, for the patent application/patent identified above, it is (choose one of options 1, 2, 3 or 4 below):
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`The assignee of the entire right. title, and interest.
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`2. I:] An assignee of less than the entire right, title, and interest (check applicable box):
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`%. Additional Statementts) by the owners
`[_| The extent (by percentage) of its ownership interest is
`holding the balance of the interest must be submitted to account for 100% of the ownership interest.
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`|:] There are unspecified percentages of ownership. The other parties, including inventors, who together own the entire
`right, title and interest are:
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`
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`An assignment from the lnventor(s) of the patent application/patent identified above. The assignment was recorded in
`the United States Patent and Trademark Office at Fteel 029130
`. Frame 0379
`, or for which a copy
`thereof is attached.
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`Additional Statement(s) by the ownerts) holding the balance of the interest must be submitted to account for the entire
`right, title, and interest.
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`3. CI The assignee of an undivided interest in the entirety (a complete assignment from one of the joint inventors was made).
`The other parties. including inventors, who together cm the entire right, title, and interest are:
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`Additional Statement(s) by the ownerts) holding the balance of the interest must be submitted to account for the entire
`right. title, and interest.
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`4. Ci The recipient. via a court proceeding or the like (e.g., bankruptcy, probate), of an undivided interest in the entirety (a
`complete transfer of ownership interest was made). The certified documentts) showing the transfer is attached.
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`The interest identified in option 1, 2 or 3 above (not option 4) is evidenced by either (choose one of options A or B below):
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`B. D A chain of title from the inventor(s), of the patent application/patent identified above, to the current assignee as folIOWs:
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`1. From:
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`2. From:
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`To:
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`The document was recorded in the United States Patent and Trademark Oiiice at
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`Reel
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`, Frame
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`, or for which a copy thereof is attached.
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`To:
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`The document was recorded in the United States Patent and Trademark Office at
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`Real
`, Frame
`, or for which a copy thereof is attached.
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`[Page 1 of 2]
`This collection of information to required by 37 CPR 3.73(b). The information is required to obtain or retain a benefit by the public which is to tile (and by the USPTO to
`process) an application. Confidentiality is governed by 35 U.S.G. 122 and 37 CFH 1.11 and 1.14. This coilection is estimated to take 12 minutes to complete, including
`gathering. preparing. and submitting the completed application form to the USPTO. Time will vary depending upon the individual case. Any comments on the amount
`of time you require to complete this form andlor suggestions for reducing this burden, should be sent to the Chief Information Officer, US. Patent and Trademark
`Office. U.S. Department of Commerce. P.O. Box 1450, Alexandria, VA 22313-1450. DO NOT SEND FEES OFt COMPLETED FORMS TO THIS ADDRESS. SEND
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`

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`PTOfAlNBB (DB-{2}
`Approved for use through 01i3112613. OMB 06510081
`US. Patent and Trademark Cities; US. DEPARTMENT OF COMMERCE
`Under the Faerwork Reduction Actol1995, no nersons are re uired to res-0nd to a collection of information unless it dis-la s a valid OMB control number.
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`STATEMENT UNDER 37 CFR 3.73101
`
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`To:
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`The document was recorded in the United States Patent and Trademark Office at
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`Reel . or for which a copy thereof is attached. , Frame
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`To:
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`
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`The document was recorded in the United States Patent and Trademark Office at
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`. or for which a copy thereof is attached.
`. Frame
`Reel
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`To:
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`The document was recorded in the United States Patent and Trademark Office at
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`Reel , or for which a copy thereof is attached. , Frame
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`To:
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`The document was recorded in the United States Patent and Trademark Office at
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`, or for which a copy thereof is attached.
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`, Frame
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`Fleet
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`As required by 37 CFR 3.73tc}(1)(i), the documentary evidence of the chain of title from the original owner to the
`assignee was. or concurrently is being, submitted for recordation pursuant to 37 CFR 3.11.
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`Additional documents in the chain of title are listed on a supplemental sheetts).
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` D
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`[NOTE: A separate copy (Le, a true copy of the original assignment document(s)) must be submitted to Assignment
`Division in accordance with 37 CFR Part 3, to record the assignment in the records of the USPTO. See MPEP 302.08]
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`The undersigned (whos
`title is supplied below) is authorized to act on behalf of the assignee.
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`/'Z~ZV’/3
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`Date
`Signature
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`( firifflegbef E (Zagj
`firm/mt"
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`Title or Registration Number
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`Printed or Typ d Name
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`[Page 2 of 2]
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