`______________________________
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`BEFORE THE PATENT TRIAL AND APPEAL BOARD
`______________________________
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`TENNANT COMPANY,
`Petitioner,
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`v.
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`OXYGENATOR WATER TECHNOLOGIES, INC.,
`Patent Owner.
`______________________________
`Case No. To be Assigned
`Patent No. RE45,415
`______________________________
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`PETITIONER’S POWER OF ATTORNEY
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`______________________________
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`Patent No. RE45,415
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`Pursuant to 37 C.F.R. § 42.10(b), Petitioner Tennant Company hereby
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`appoints the practitioners associated with Fredrikson & Byron, P.A., Customer
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`Number 22859, including the following counsel, as their attorneys to transact all
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`business in the United States Patent & Trademark Office associated with any inter
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`partes review involving U.S. Patent No. RE45,415.
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`Lead Counsel
`R. Scott Johnson
`Reg. No. 45,792
`RSJohnson@fredlaw.com
`Fredrikson & Byron, P.A.
`505 E. Grand Ave., Suite 200
`Des Moines, IA 50309
`Tel: (515) 242-8930
`Fax: (515) 242-8950
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`Back-Up Counsel
`Adam R. Steinert
`asteinert@fredlaw.com
`pro hac vice pending
`Fredrikson & Byron, P.A.
`200 South 6th Street, Suite 4000
`Minneapolis, MN 55402
`Tel: (612) 492-7000
`Fax: (612) 492-7797
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`The individual signing below has the authority to execute this document on
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`behalf of Petitioner Tennant Company.
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`Date: March 3, 2021
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`__________________________
`Mary Dean,
`Assistant Secretary, Senior Legal Counsel
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`2
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`CERTIFICATE OF SERVICE
`Per agreement of the parties and pursuant to 37 C.F.R. ¶ 42.105(b), the
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`undersigned certifies that a copy of this Power of Attorney was served on March
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`9, 2021 electronically via Secured File Transfer on the following:
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`Larina Alton for Schwegman Lundberg & Woessner, P.A.
`Larina.Alton@maslon.com
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`Nathan Louwagie
`NLouwagie@carlsoncaspers.com
`OWT@carlsoncaspers.com
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`Dated: March 9, 2021
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`/R. Scott Johnson/
`R. Scott Johnson
`Reg. No. 45,792
`Counsel for Petitioners
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