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ARTICLE · 20 JANUARY 2023

PTAB Denies Discovery Of Draft Declaration

Jones Day
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On November 18, 2022, a panel of three PTAB administrative patent judges denied a Patent Owner's Request for Additional Discovery in Twitter, Inc. v. Palo Alto Research Center Inc., IPR2021-01398.

United StatesIntellectual Property

On November 18, 2022, a panel of three PTAB administrative patent judges denied a Patent Owner's Request for Additional Discovery in Twitter, Inc. v. Palo Alto Research Center Inc., IPR2021-01398. The PTAB found that additional discovery would not be in the interest of justice in this particular case.

Petitioner Twitter, Inc. initiated an inter partes review (IPR) proceeding to challenge the validity of U.S. Patent No. 7,043,475 ("the '475 Patent") owned by Palo Alto Research Center Inc. The '475 Patent relates to techniques for clustering user sessions using multi-modal information, including proximal cue information.

Patent Owner sought discovery of an unfiled draft reply declaration referenced by Petitioner's declarant, Dr. Turnbull during his deposition. During a remote deposition, Dr. Turnbull relied on a sentence of a draft declaration that he erroneously had open. On realizing the error, Dr. Turnbull shifting to the filed declaration for the rest of his

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