About Heidi

Heidi is a first chair trial lawyer with two decades of experience representing some of the hottest tech companies in the world in complex patent litigation. A former astrophysicist and registered patent attorney, Heidi easily understands a variety of technical disciplines, from software to medical devices.

I like to win.

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Experience

    CoolIT Protects Key Patent at PTAB

    September 1, 2020

    In August 2020, Cooley convinced a panel of judges at the PTAB to protect a key patent for CoolIT, a leader in data center cooling. A three-judge panel upheld the validity of all challenged claims while adopting arguments Cooley advanced against Petitioner’s expert and his proposed prior art combination.

    Related contacts

    Reuben Chen
    Partner, Palo Alto
    Heidi Keefe
    Partner, Palo Alto
    Daniel Knauss
    Partner, Palo Alto
    Dustin Knight
    Associate, Washington, DC

    Related Practices & Industries

    Facebook scores key victory by nixing online messaging patent

    May 16, 2017

    In May 2015, Cooley convinced a panel of judges at the PTAB to cancel claims of an online messaging patent asserted against Facebook by plaintiff EveryMD. A three-judge panel ruled that the challenged claims of the patent are invalid and also threw out EveryMD's proposed new claims finding that the plaintiff failed to prove the validity of those claims in light of prior art. In March 2016, the Federal Circuit upheld the PTAB's decision in its entirety.

    Related contacts

    Heidi Keefe
    Partner, Palo Alto
    Mark Weinstein
    Partner, Palo Alto
    Reuben Chen
    Partner, Palo Alto
    Andrew Mace
    Special Counsel, Palo Alto

    Related Practices & Industries

    Trial win for Facebook in patent case targeting “Like” button

    July 27, 2016

    Cooley defended Facebook in a patent infringement suit that targeted one of Facebook's most prominent features – the "Like" button. Rembrandt Social Media filed the case in the Eastern District of Virginia, accusing Facebook of willfully infringing two patents covering social media.

    Originally, Rembrandt accused Facebook of willfully infringing two patents but we convinced the court to dismiss willful and indirect patent infringement claims early in the case. We also persuaded the judge to exclude the testimony of two Rembrandt expert witnesses, including, significantly, an expert tasked with calculating damages. As a result of this ruling, Rembrandt filed an appeal with the Federal Circuit, which was denied, and the case proceeded to trial.

    In June 2014, following a five day trial, Cooley secured a complete defense verdict - the jury issued a ruling of non-infringement and also invalidated the two patents. To date, Facebook has had only two patent jury trials, both of which Cooley has resolved successfully.

    Related contacts

    Heidi Keefe
    Partner, Palo Alto
    Mark Weinstein
    Partner, Palo Alto
    Phillip Morton
    Partner, Washington, DC
    Liz Stameshkin
    Special Counsel, Palo Alto
    Andrew Mace
    Special Counsel, Palo Alto
    Dane Voris
    Special Counsel, Boston

    Related Practices & Industries

    Federal Circuit affirms patent cancellation in Facebook’s first-ever patent case

    March 3, 2015

    When Facebook was first sued for patent infringement over eight years ago, the young company turned to Cooley.

    The case was filed in the Eastern District of Pennsylvania by venture capital firm, Cross Atlantic Capital Partners (XACP) just one year after Facebook expanded its site from Harvard University to the general public. XACP claimed that its "online community" patent covered a wide variety of key Facebook features. XACP was seeking royalties, a permanent injunction against Facebook, and attorneys' fees.

    Cooley guided the company through seven years of hotly contested litigation across multiple forums. Just a few weeks before trial, Facebook asked the Patent Office to invalidate the patent based on several systems and books that predated the patent, and convinced the district court to stay the case pending the Patent Office's decision.

    The Patent Office initially found the claims valid. Facebook appealed to the Board of Patent Appeals (BPAI) and the BPAI judges ruled that the Examiner was wrong, and that the patent claims were invalid. XACP appealed and, in 2014, the Federal Circuit affirmed the invalidity of all claims of the patent.

    Related contacts

    Heidi Keefe
    Partner, Palo Alto
    Mark Weinstein
    Partner, Palo Alto
    Lowell Mead
    Partner, Palo Alto
    Liz Stameshkin
    Special Counsel, Palo Alto

    Related Practices & Industries

The… thing a client looks for in a lawyer is someone who gives them the confidence that you’re giving them the best advice that you possibly can.

Heidi Keefe

Admissions and credentials

  • California
  • Registered to practice before the United States Patent and Trademark Office (USPTO)

Rankings and accolades

Lawdragon: 500 Leading Litigators in America

Managing Intellectual Property: IP Litigator of the Year (California) Shortlist  

Law360: Top Women in PTAB Appearances

Law360: Top 20 Influential Women in IP Law

The Recorder: Women Leaders in Technology Law

Daily Journal: Top 100 Lawyers in California, Top Intellectual Property Litigators, Top Women Lawyers, Top Women Litigators

PTAB Bar Association: Top 50 Women in PTAB Trials

Managing Intellectual Property: Top 250 Women in IP

IAM Patent 1000: Leading Patent Lawyer

Managing Intellectual Property: IP Star

Chambers USA: Intellectual Property: Patent Litigation – California (2021 – 2025)

Chambers USA: Intellectual Property – Nationwide (2021 – 2025)

Best Lawyers in America: Intellectual Property Litigation

The Legal 500 US: Leading Lawyer in Patents: Litigation (2024 – 2025)

Memberships and affiliations

  • American Bar Association (ABA)
  • Silicon Valley IP Law Association

Heidi is a world-class stand-up litigator who has a knack for understanding the technology and breaking it down in a way that’s understandable to a lay jury or a judge. I trust her, and I trust the team, and they've done nothing but get good results for us.

Chief IP Counsel

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