Paul Haughey is a partner in the San Francisco office of Kilpatrick Townsend and counsels clients in all facets of intellectual property strategy, primarily in the patent area, with an emphasis on strategic counseling, patent opinions and Inter Partes Reviews under the America Invents Act. He has written nearly 100 patent opinions and has been deposed 6 times as an opinion witness. He has handled 10 inter partes reviews under the new America Invents Act. He also handles early phase litigation infringement and validity analysis for settlement evaluation, product clearances (right-to-use studies), and acquisition due diligence. He has guided clients in product design activities to avoid infringement problems.

With more than 30 years of patent experience, Mr. Haughey is familiar with a wide range of technologies, including Internet systems, software, financial systems, mobile phones, microprocessors, computer peripherals, analog and digital circuit design, optics and medical instrumentation.

Mr. Haughey has successfully filed reexaminations that allowed stays of litigation and cost savings for clients, making it financially viable to fight a patent. He has successfully convinced patent owners to significantly reduce settlement demands, or to drop infringement claims altogether against clients without the need for court or Patent Office proceedings.

Mr. Haughey previously worked as a corporate attorney working on financings. With that corporate understanding he is uniquely experienced to deal with patent infringement allegations on the eve of an IPO. He quickly investigated patent infringement allegations filed against a number of companies after filing with the SEC for an IPO, and successfully satisfied the underwriters with non-infringement opinions and appropriate prospectus language.

Prior to entering the field of law, Mr. Haughey was a circuit design engineer at Hughes Aircraft Company.

Mr. Haughey was listed in The Best Lawyers in America® for Patent Law in 2016, 2017 and 2018. He was recommended in 2015 and the three years prior by Legal 500 US in the area of Patent Prosecution. Mr. Haughey was recognized as an "IP Star" in 2017 and the four years immediately preceding by Managing Intellectual Property magazine. He was recognized by Legal Media Group in its 2013 Guide to the World's Leading Patent Practitioners.

Professional & Community Activities

American Bar Association

American Intellectual Property Law Association

Bar Association of San Francisco

San Francisco Patent and Trademark Law Association

Volunteer for Community Legal Services in East Palo Alto & East Bay Community Law Center.

Supporter/sponsor of Eastside College Preparatory School in East Palo Alto &, & United Cerebral Palsy

Masters swimmer

Spanish Conversation classes


  • University of California, Hastings College of the Law, J.D. (1980)
    Order of the Coif
  • University of California, Irvine, B.S., Electrical Engineering (1976)

Bar Admissions

  • California (1980)


  • U.S. Patent and Trademark Office

Who We Are

What fully engaged means to me:

Taking ownership of client legal problems with an in-house business hat, with timely and efficiently produced deliverables.

Two Embarcadero Center, Suite 1900
San Francisco, CA, 94111
t +1 415.273.4787
f +1 415.723.7108

Paul C. Haughey

Experience Highlights

Ex-parte reexam for Visa U.S.A. Inc.
Prepared a draft ex-parte reexam for client Visa, against Restricted Spending Solutions Pat. 6,044,360. This patent related to spending more
Inter Partes Review relating to RAID memory
Representing First Data in IPR challenges of two patents relating to RAID memory controllers. First Data v. Cardsoft  (PTAB Case Nos.: more
Inter partes review relating to online rewards programs
Starbucks Corporation v. Kroy Holdings, LLC, IPR2015-00260. more
Inter partes review relating to digital rights management
Sony Network Entertainment International LLC v. William Grecia, IPR2015-00422.