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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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`BOSE CORPORATION,
`Petitioner,
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`v.
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`KOSS CORPORATION,
`Patent Owner.
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`_____________________
`CASE: IPR2021-00680
`U.S. PATENT NO. 10,469,934
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`PATENT OWNER’S POWER OF ATTORNEY
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`504252654 v1
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`POWER OF ATTORNEY
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`Pursuant to 37 C.F.R. § 42.10(b), Patent Owner, Koss Corporation, hereby
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`appoints the practitioners associated with K&L Gates LLP, Customer Numbers
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`24573 and 26285, as it attorneys to transact all business in the United States Patent
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`and Trademark Office associated with the following inter partes review
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`proceedings:
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`• Bose Corp. v. Koss Corp., IPR2021-00297
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`• Bose Corp. v. Koss Corp., IPR2021-00612
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`• Bose Corp. v. Koss Corp., IPR2021-00680
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`The undersigned is authorized to sign this Power of Attorney on behalf of
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`Patent Owner.
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`Date: _________________
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`By: _____________________________
` Koss Corporation
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`Name: Michael J. Koss, Jr.
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`Title: Vice President, Marketing & Product
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`505392277.1
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`Certification of Service Under 37 C.F.R. § 42.6(e)(4)
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`I hereby certify that on January 3, 2022, I caused a true and correct copy of
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`the foregoing to be served on the following counsel for Petitioner by electronic mail
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`to the following email address:
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`Michael N. Rader
`Gregory S. Nieberg
`Nathan R. Speed
`Wolf, Greenfield & Sacks, P.C.
`600 Atlantic Avenue
`Boston, MA 02210-2206
`Email: MRader-PTAB@wolfgreenfield.com
`Email: GNieberg@wolfgreenfield.com
`Email: nspeed@wolfgreenfield.com
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`/Mark G. Knedeisen/
`Mark G. Knedeisen (Reg. No. 42,747)
`K&L Gates Center, 210 Sixth Avenue
`Pittsburgh, Pennsylvania 15222
`Tel.: (412) 355-6342
`mark.knedeisen@klgates.com
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`Counsel for Patent Owner
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`By:
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