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`BEFORE THE PATENT TRIAL AND APPEAL BOARD
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`TENNANT COMPANY,
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`Petitioner,
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`OXYGENATOR WATER TECHNOLOGIES, INC.,
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`Patent Owner.
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`Case No. To be Assigned
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`Patent No. RE45,415
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`PETITIONER’S POWER OF ATTORNEY
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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 Frednkson & Byron, P.A., Customer
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`Number 22859, including the following counsel, as their attorneysto 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
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`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
`admitted pro hac vice
`Fredrikson & Byron, P.A.
`200 South 6" Street, Suite 4000
`Minneapolis, MN 55402
`Tel: (612) 492-7000
`Fax: (612) 492-7797
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` Second Back-Up Counsel
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`Thomas M.Patton
`Reg. No. 76,193
`tpatton@fredlaw.com
`Fredrikson & Byron, P.A.
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`505 E. Grand Ave., Suite 200
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`Des Moines, IA 50309
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`Tel: (515) 242-8908
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`Fax: (515) 242-8950
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`Patent No. RE45,415
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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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`Mary Deéan,
`Assistant Secretary, Senior Legal Counsel
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`Date: October /4_, 2021
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