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UNITED STATES PATENT AND TRADEMARK OFFICE
`___________________
`
`BEFORE THE PATENT TRIAL AND APPEAL BOARD
`___________________
`
`
`TWINSTRAND BIOSCIENCES, INC.
`Petitioner,
`v.
`GUARDANT HEALTH
`Patent Owner.
`
`___________________
`
`IPR2022-01152
`U.S. Patent No. 11,118,211
`___________________
`
`
`PETITIONER’S POWER OF ATTORNEY
`
`
`
`
`
`
`
`
`
`
`Mail Stop "PATENT BOARD"
`Patent Trial and Appeal Board
`U.S. Patent and Trademark Office
`P.O. Box 1450
`Alexandria, VA 22313-1450
`
`

`

`Pursuant to 37 C.F.R. § 42.10(b), Petitioner, TwinStrand Biosciences, Inc.,
`
`having a principal place of business at 3131 Elliott Ave., Suite 750, Seattle,
`
`Washington 98121, hereby appoints practitioners of Customer Number 26111 as
`
`its attorneys to transact all business in the United States Patent & Trademark
`
`Office associated with an inter partes review of U.S. Patent No. 11,118,211. These
`
`attorneys include at least:
`
`Lead Counsel:
`Ralph Wilson Powers III, Ph.D. (Reg. No. 63,504)
`Back-up Counsel: David H. Holman, Ph.D. (Reg. No. 61,205)
`Kristina C. Kelly, Esq. (Reg. No. 58,164)
`Christopher M. Gallo, Ph.D. (Reg. No. 70,291)
`Tyler C. Liu, Esq. (Reg. No. 72,126)
`
`Address:
`
`STERNE, KESSLER, GOLDSTEIN & FOX P.L.L.C.
`1100 New York Avenue, NW
`Washington, DC 20005
`202.371.2600 (reception)
`202.371.2540 (facsimile)
`tpowers-PTAB@sternekessler.com
`dholman-PTAB@sternekessler.com
`kckelly-PTAB@sternekessler.com
`cgallo-PTAB@sternekessler.com
`tliu-PTAB@sternekessler.com
`
`FOR: TWINSTRAND BIOSCIENCES, INC.
`SIGNATURE:
`Karen K. Dabbs, J.D.
`NAME:
`General Counsel
`TITLE:
`June 14, 2022
`DATE:
`
`- 1 -
`
`

`

`CERTIFICATE OF SERVICE (37 C.F.R. § 42.6(e))
`I certify that the above-captioned PETITIONER'S POWER OF
`
`ATTORNEY was served in its entirety on June 16, 2022, upon the Patent Owner
`
`via FedEx® at the following addresses:
`
`Guardant Health / WSGR
`650 Page Mill Road
`Palo Alto CA 94304
`Patent Owner’s Correspondence Address of
`Record for U.S. Patent No. 11,118,221
`
`Respectfully submitted,
`STERNE, KESSLER, GOLDSTEIN & FOX P.L.L.C
`
`/R. Wilson Powers III/
`
`Ralph Wilson Powers III, Ph.D.
`Registration No. 63,504
`Lead Attorney for Petitioner
`
`Date: June 16, 2022
`1100 New York Avenue, N.W.
`Washington, D.C. 20005-3934
`(202) 371-2600
`
`

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