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`BEFORE THE PATENT TRIAL AND APPEAL BOARD
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`SPRINT SPECTRUM L.P., SPRINTCOM, INC., T-MOBILE USA, INC., and T—
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`MOBILE US, INC.
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`Petitioners
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`V.
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`INTELLECTUAL VENTURES II LLC
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`Patent Owner
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`US. Patent No. 8,682,357
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`US. Patent No. 8,897,828
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`US. Patent No. 8,953,641
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`US. Patent No. 9,320,018
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`US. Patent No. 9,532,330
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`US. Patent No. 9,681,466
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`T-MOBILE USA, INC. AND T-MOBILE US= INC.’S POWER OF
`ATTORNEY
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`Petitioners T-Mobile USA, Inc. and T-Mobile US, Inc. (collectively, “T-
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`Mobile") hereby appoint the following practitioners as their attomeys/agents to
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`transact all business in the United States Patent & Trademark Office associated
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`with the inter partes reviews of US. Patent Nos. 8,682,357, 8,897,828, 8,953,641,
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`9,320,018, 9,532,330, and 9,681,466:
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`
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`Robert C. Hilton (Reg. No. 47,649)
`rhilton@mcguirewoods.com
`MCGUIREWOODS LLP
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`2000 McKinney Ave, Suite 1400
`Dallas, TX 75201
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`(214) 932-6400
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`(214) 932-6499 (Fax)
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`George B. Davis (Reg. No. 68,205)
`Daniel J. Jakubisin (Reg. No. 76,320)
`gdavis@mcguirewoods.com
`djakubisin@mcguirewoods.com
`MCGUIREWOODS LLP
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`800 East Canal St.
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`Richmond, VA 23219
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`(804) 775- 1000
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`(804) 775-2016 (Fax)
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`The individual signing below has the authority to execute this document on behalf
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`of T—Mobile.
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`:és’fibfif % I ;
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`Step en P. McGrath
`Principal Corporate Counsel
`T-Mobile USA, Inc.
`T-Mobile US, Inc.
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`mffléaovfi
`
`ate
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`