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Philip Tassin

Associate

Whether he’s representing major corporations in complex civil litigation, or fighting for an individual’s freedom, Mr. Tassin leverages a deep understanding of the details without losing sight of the big picture. Since joining Keker, Van Nest & Peters in the fall of 2013, Mr. Tassin has represented a variety of individuals and businesses in high-stakes litigation at both the trial and appellate levels, including disputes involving securities, breach of contract, breach of fiduciary duty, intellectual property, professional negligence, and the ever-changing landscape of medical marijuana. In each case, Mr. Tassin has guided his clients through uncharted legal territory and, where necessary, developed creative approaches to draw the boundaries in their favor. 

Mr. Tassin also maintains an active pro bono practice, working alongside the Electronic Frontier Foundation to challenge the National Security Agency’s warrantless surveillance of Internet users, writing an amicus brief to the U.S. Supreme Court in support of the Affordable Care Act’s contraception coverage requirement, and writing an amicus brief in support of a challenge to the VA’s discriminatory ban on surgical care for transgender veterans.

Whether he’s representing major corporations in complex civil litigation, or fighting for an individual’s freedom, Mr. Tassin leverages a deep understanding of the details without losing sight of the big picture. Since joining Keker, Van Nest & Peters in the fall of 2013, Mr. Tassin has represented a variety of individuals and businesses in high-stakes litigation at both the trial and appellate levels, including disputes involving securities, breach of contract, breach of fiduciary duty, intellectual property, professional negligence, and the ever-changing landscape of medical marijuana. In each case, Mr. Tassin has guided his clients through uncharted legal territory and, where necessary, developed creative approaches to draw the boundaries in their favor. 

Mr. Tassin also maintains an active pro bono practice, working alongside the Electronic Frontier Foundation to challenge the National Security Agency’s warrantless surveillance of Internet users, writing an amicus brief to the U.S. Supreme Court in support of the Affordable Care Act’s contraception coverage requirement, and writing an amicus brief in support of a challenge to the VA’s discriminatory ban on surgical care for transgender veterans.

San Francisco Supports Trans Vets in Court Case

July 11, 2017

Keker, Van Nest & Peters has filed an amicus brief asking the U.S. Court of Appeals for the Federal Circuit to order the U.S. Department of Veterans Affairs to end its ban on providing surgery for trans veterans. Read more

Fans Strike Out in Suit over MLB Stadium Safety Netting

11/17/2016

Keker & Van Nest defeat a proposed class action accusing Major League Baseball of failing to protect spectators at ballparks with safety netting. Read more

Why Pediatricians Care So Much About the Supreme Court’s Birth Control Case

03/24/2016

KVN submitted a brief to the Supreme Court on behalf of the American Academy of Pediatrics, which argued that the Supreme Court should not allow religious objectors to obstruct third parties from obtaining medication and treatments that their doctors have prescribed. Read more

Keker & Van Nest Wins Summary Judgment for TSMC in Patent Dispute with Ziptronix

10/21/2014

Ziptronix had asserted nine patents and more than 500 claims over TSMC’s manufacturing of semiconductors. Read more

Keker & Van Nest and EFF Ask Judge to Rule NSA Internet "Backbone" Spying Techniques Unconstitutional

07/25/2014

Keker & Van Nest filed a brief in the Jewel v. NSA case claiming that backbone surveillance violates the 4th Amendment at the time of seizure and at the time of the search for selectors. Read more

  • Why Treaties Can Abrogate State Sovereign Immunity: Applying Central Virginia Community College v. Katz to the Treaty Power, 101 Calif. L. Rev. 755 (2013).