Clement Seth Roberts


San Francisco

Clem is an accomplished trial lawyer whose practice focuses on intellectual property litigation and complex commercial cases. He has successfully tried a wide variety of cases in state and federal courts, the ITC, and in arbitration.

Clem acts as lead counsel for companies of all sizes across a broad range of industries. In recent years he has lead cases dealing with medical devices, network security, anti-cancer drugs, video games, battery chemistry, consumer electronics, blockchain and other payments systems, streaming video, ticketing systems, telecommunications, and many more.

Clem has an active trial practice. In 2023 alone, Clem acted as lead counsel for teams that won two jury verdicts, three ITC proceedings, and numerous IPRs and dispositive motions.

Clem has been recognized in the Daily Journal’s list of the top 75 IP Litigators in California. In the latest Chambers USA rankings, clients note he is a “very persuasive advocate who knows the law inside out and is able to get to the heart of the issue very quickly.“ Managing Intellectual Property described him as a “highly respected litigator in the California IP market and beyond.” Intellectual Asset Management’s Patent 1000 notes he is a “commercially savvy first-chair trial lawyer,” a “tenacious, pragmatic litigator who excels at finding innovative solutions,” “one of the best writers anywhere” and a “fantastic negotiator.”

Current clients include Sonos, Zynga, Plexxicon, Abbott, Altice, Roblox, Discord, HCW, HVMN, Go1, ConsenSys, MoonActive, Checkpoint, RingCentral, and Cellink.

Clem serves on the Orrick’s Management Committee and is former head of the firm’s 100-lawyer IP practice.

Clem also maintains an active pro-bono practice focused on environmental impact litigation. He lives in Marin and spends his free time cycling around Mt. Tam.

    • Sonos v. Google: On behalf of Sonos, we filed a patent infringement suit against Google in US District Court for the Central District of California and the ITC. The litigation concerns five patents covering multi-room audio technology.
    • Finjan v. Check Point Software Technologies: We are defending Check Point from a high stakes, multi-patent case.
    • PurePredictive v. H2Oai: San Francisco AI-provider was sued by competitor Purepredicitive Inc, for patent infringement in the Federal District Court of Northern California. We invalidated the patent on a motion to dismiss, and currently represent in the Federal Circuit.