`Williams Simons & Landis PLLC
`Direct: 512.543.1372
`jhardt@wsltrial.com
`
`April 2, 2021
`
`Via Email
`Reza Mirzaie
`Mark A. Fenster
`Paul A. Kroeger
`C. Jay Chung
`Kristopher R. Davis
`James N. Pickens
`RUSS AUGUST & KABAT
`12424 Wilshire Boulevard 12th Floor
`Los Angeles, CA 90025
`rmirzaie@raklaw.com
`mafenster@raklaw.com
`kdavis@raklaw.com
`pkroeger@raklaw.com
`jchung@raklaw.com
`jpickens@raklaw.com
`
`Re:
`
`Inter Partes Review Proceeding Case No. 2021-00054; U.S. Patent No. 10,534,382
`
`To Whom It May Concern,
`
`I write on behalf of Defendant Vivint, Inc. (“Vivint”) regarding the matter of Ecofactor, Inc. v.
`Vivint, Inc., No. 6:20-cv-00080-ADA (W.D. Tex.) (“the Texas Litigation”). Vivint is accused of
`infringing U.S. Patent No. 10,534,382 (“the ’382 Patent”) in the Texas Litigation.
`
`This letter is in relation to Google LLC’s Petition for Inter Partes Review of the ’382 Patent (the
`“‘382 IPR Petition”), IPR No. 2021-00054.
`
`Vivint hereby stipulates not to present the combination of prior art references in the Ground of the
`‘382 IPR Petition before the District Court in the Litigation so long as (i) the Board institutes inter
`partes review, and (ii) at the time of trial in the Litigation, the ’382 IPR has not been terminated
`for reasons other than a decision on the merits.
`
`327 Congress Avenue, Suite 490, Austin, Texas 78701
`
`
`
`April 2, 2021 Page 2
`April 2, 2021
`Page 2
`
`Sincerely,
`Sincerely,
`
`/
`
`Jonathan Hardt
`Jonathan Hardt
`
`