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Zivojnovic, Ognjen

Ognjen Zivojnovic

Direct Tel: +1 415-875-6469
San Francisco
Tel: +1 415 875 6600 Fax: +1 415 875 6700

Ognjen “Ogi” Zivojnovic is a partner in Quinn Emanuel’s San Francisco office.  Drawing upon his background in engineering, his practice is dedicated to helping companies respond to challenges they face at the intersection of law and technology.  His primary focus is patent litigation—where he has successfully represented both plaintiffs and defendants—and he has also helped clients navigate trade secret, copyright, trademark, contract, fraud, and antitrust issues involving technical subject matter.  

Ogi has represented clients in district and state court litigation, International Trade Commission investigations, post-grant proceedings before the Patent Trial & Appeal Board, and appeals to the Federal Circuit.  Leveraging his patent litigation expertise and prior experience as a patent agent, Ogi also counsels clients on high stakes patent prosecution efforts and patent transactions.

An engineer by training, with a B.S. and M.S. in Electrical Engineering from Stanford University, Ogi previously worked at Qualcomm, where he developed firmware for LTE cell phone modems.  His technical skills run the gamut of computer technology, and he has litigated cases involving consumer software and products, A/V processing and transmission, cloud services, artificial intelligence, network security, traffic routing, graphics processors, wireless chips, and semiconductor manufacture.

  • Fortinet
  • ByteDance/TikTok
  • Google
  • Salesforce
  • Snowflake
  • MediaTek
  • California Institute of Technology
  • Voxer
  • Defended Salesforce against patent infringement allegations by Applications in Internet Time.  The Court granted Salesforce’s motion for summary judgment in full, finding the asserted patents not infringed and invalid.
  • Represented Voxer in its patent infringement trial against Meta (f.k.a. Facebook).  The jury found that Facebook and Instagram Live infringe Voxer’s patents and awarded Voxer $175 million in damages, plus ongoing royalties.
  • Represented CATL, the largest EV battery maker in a world, in post-grant proceedings commenced by its competitor CALB against U.S. Patent No. 10,930,932.  The Patent Trial and Appeal Board denied institution, finding CALB had failed to meet its burden of showing CATL’s patent was more likely than not invalid.
  • Defended Google in an International Trade Commission investigation launched by Sonos, alleging that Google infringed some of Sonos’ oldest patents.  The Commission found that Google’s redesigns did not infringe Sonos patents, thereby permitting Google to continue importing all accused products without any business interruption.
  • Represented the California Institute of Technology (“Caltech”) in its patent infringement trial against Apple and Broadcom.  The jury found in Caltech’s favor and awarded Caltech $1.1 billion in damages, the sixth largest patent verdict at the time.  The Federal Circuit affirmed the jury’s finding of liability.  The case settled on remand prior to a retrial on damages.
  • Represented Snowflake in a Section 1782 action seeking discovery to assist trademark litigation in Germany.  The Court granted the requested discovery and then ordered Yeti to pay $10,000 per day for failing to comply with its discovery obligations.  The parties settled soon after the Court’s order sanctioning Yeti.
  • Defended ChargePoint against patent infringement allegations by SemaConnect, both in district court and on appeal.  The district court granted ChargePoint’s motion to dismiss, finding all of SemaConnect’s patents invalid under 35 U.S.C. § 101.  The district court decision was affirmed by the Federal Circuit on appeal, and ChargePoint’s Federal Circuit petition for en banc rehearing and Supreme Court petition for writ of certiorari to were both denied.
  • University of California, Berkeley School of Law
    (J.D., 2015)
  • Stanford University
    (M.S., Electrical Engineering, 2010)
    (B.S., Electrical Engineering, 2009)
  • The State Bar of California
  • United States District Court:
    • Northern District of California
    • Central District of California
  • United States Court of Appeals
    • 9th Circuit
    • Federal Circuit
  • Registered to Practice Before the United States Patent and Trademark Office
  • German
  • Serbian
  • Ropes & Gray LLP:
    • Patent Agent, 2011-2014
  • Qualcomm:
    • Firmware Engineer, 2010-2011
  • Law360 “Rising Star” in Intellectual Property, 2024
  • The Best Lawyers in America: Ones to Watch, Commercial Litigation, 2024
  • Super Lawyer Rising Star, Business Litigation, 2022-2024
  • Ognjen Zivojnovic, Note, Patentable Subject Matter After Alice–Distinguishing Narrow Software Patents from Overly Broad Business Method Patents, 30 BERKELEY TECH. L.J. (2015).
  • Ognjen Zivojnovic et al., A Novel Method for Automatic Estimation of M0 used by ASL CBF Quantification, 18 PROC. INT’L SOC’Y FOR MAGNETIC RESONANCE MED. 3148 (2010), available at