Antonio Moriyama Sistos

I'll research this attorney before drafting.

Attorney Summary — Antonio Moriyama Sistos

Note on identification: The tracked record names this attorney "Antonio Moriyama Sistos," but every publicly available court filing and firm listing I could locate identifies a Quinn Emanuel patent litigator as Antonio R. Sistos (also appearing as Antonio Ricardo Sistos), California Bar No. 238847. I found no source connecting the "Moriyama" name element to that attorney, and the only "Moriyama Sistos" match in search results is an unrelated financial-services professional. The two are most likely the same person, but that should be confirmed before relying on the name variant.

Focus areas and firm context. The available record shows a patent litigation practice concentrated on consumer-technology and internet-platform defendants, primarily large operating companies. Tracked and search-verified matters include Bedrock Computer Technologies v. Softlayer (E.D. Tex., Linux/OS and e-commerce patents), Polaris IP / Bright Response v. Google (E.D. Tex., online advertising), Priceplay.com v. Google (N.D. Cal., internet advertising), and Personal Audio v. Google (audio/codec patents, E.D. Tex. / D. Del.). He has been with Quinn Emanuel Urquhart & Sullivan in San Francisco since at least 2010 (then an associate, appearing in declarations from 2010–2014) and appears in the tracked data as of counsel. No prior-firm history surfaced in the sources reviewed, and the technology area asserted in the one tracked case (Google LLC v. Security First Innovations, LLC) is not disclosed in the docket materials I could access.

Side preference. Defense-side, operating companies only. The tracked data is 0 plaintiff / 1 defendant, and every additional matter uncovered in searching is Google defense work adverse to NPEs and individual patent holders. I found no representation of a patent plaintiff or PAE.

Notable matters and outcomes. The most prominent verified involvement is Personal Audio LLC v. Google, in which a jury returned a $15 million verdict against Google in June 2023 (reported by Reuters); Sistos is listed among Quinn Emanuel counsel for Google — a loss, not a win, and worth noting as such. He also appears as counsel in Bedrock Computer Technologies v. Softlayer (declaration supporting defendants' summary judgment motion of indefiniteness) and in Polaris IP / Bright Response v. Google and Priceplay.com v. Google. In the single tracked case, Google LLC v. Security First Innovations, LLC (filed as Security First Innovations, LLC v. Google LLC, E.D. Va. No. 2:23-cv-00097), he appears for Google; I could not verify a disposition.

PTAB / IPR experience. Not verified. I found no record of IPR, PGR, or CBM appearances, though search coverage of PTAB filings by attorney name was incomplete.

Bar and education. California State Bar No. 238847 (admission date not independently confirmed). Education and law school are not reliably sourced in the materials reviewed and are therefore omitted.