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`UNITED STATES PATENT AND TRADEMARK OFFICE
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`BEFORE THE PATENT TRIAL AND APPEAL BOARD
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`ARGENTUM PHARMACEUTICALS LLC,
`Petitioner,
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`v.
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`MERCK PATENTGESELLSCHAFT,
`Patent Owner.
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`Case No. Unassigned
`Patent No. 8,673,921
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`PETITIONER’S POWER OF ATTORNEY
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`Patent No. 8,673,921
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`Petitioner Argentum Pharmaceuticals LLC hereby appoints the Practitioners
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`associated with PTO Customer Number 23911 (Crowell & Moring LLP) and Tyler
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`C. Liu (Reg. 72,126, Argentum Pharmaceuticals LLC) as its attorneys to transact
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`all business in the U.S. Patent & Trademark Office in connection with any inter
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`partes review of the captioned patent, U.S. Patent No. 8,673,921, including the
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`appointment of lead and backup counsel.
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`For:
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`Argentum Pharmaceuticals
`LLC
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`Name:
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`Jeffrey R. Gardner, B.S., MBA
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`Title:
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`Chief Executive Officer
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`Signature:
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`Date:
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`29 December, 2017
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