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`Mail Stop Patent Board
`Patent Trial and Appeal Board
`U.S. Patent and Trademark Office
`PO. Box 1450
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`Alexandria, VA 22313-1450
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`PATENT OWNER’S POWER OF ATTORNEY IN A POST GRANT PROCEEDINGS BEFORE THE
`PATENT TRIAL AND APPEAL BOARD
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`Patent Owner, BlackBerry Limited, hereby appoints the following practitioners as its attorneys to
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`transact all business in the United States Patent & Trademark Office associated with any inter partes
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`review, covered business method review, post grant review, or other review proceedings before the Patent
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`Trial and Appeal Board:
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`Michael T. Hawkins, Reg. No. 57,867
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`Nicholas Stephens, Reg. No. 74,320
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`Kenneth W. Darby, Reg. No. 65,068
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`Kim Leung, Reg. No. 64,399
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`Craig A. Deutsch, Reg. No. 69,264
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`and all practitioners associated with PTO Customer Number 26191.
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`l have the authority to execute this document on behalf of BlackBerry Limited
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`BlackBerry Limited
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`Q 3 (Jr
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`Title:
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`AUTHORIZED SlGNlNG OFFICER
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`Date:
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