For more than four decades, Fenwick & West LLP has helped some of the world’s most recognized companies become, and remain, market leaders. From emerging enterprises to large public corporations, our clients are leaders in the technology, life sciences and cleantech sectors and are fundamentally changing the world through rapid innovation.  MORE >

Fenwick & West was founded in 1972 in the heart of Silicon Valley—before “Silicon Valley” existed—by four visionary lawyers who left a top-tier New York law firm to pursue their shared belief that technology would revolutionize the business world and to pioneer the legal work for those technological innovations. In order to be most effective, they decided they needed to move to a location close to primary research and technology development. These four attorneys opened their first office in downtown Palo Alto, and Fenwick became one of the first technology law firms in the world.  MORE >

From our founding in 1972, Fenwick has been committed to promoting diversity and inclusion both within our firm and throughout the legal profession. For almost four decades, the firm has actively promoted an open and inclusive work environment and committed significant resources towards improving our diversity efforts at every level.  MORE >

At Fenwick, we are proud of our commitment to the community and to our culture of making a difference in the lives of individuals and organizations in the communities where we live and work. We recognize that providing legal services is not only an essential part of our professional responsibility, but also an excellent opportunity for our attorneys to gain valuable practical experience, learn new areas of the law and contribute to the community.  MORE >

Year after year, Fenwick & West is honored for excellence in the legal profession. Many of our attorneys are recognized as leaders in their respective fields, and our Corporate, Tax, Litigation and Intellectual Property Practice Groups consistently receive top national and international rankings, including:

  • Named Technology Group of the Year by Law360
  • Ranked #1 in the Americas for number of technology deals in 2015 by Mergermarket
  • Nearly 20 percent of Fenwick partners are ranked by Chambers
  • Consistently ranked among the top 10 law firms in the U.S. for diversity
  • Recognized as having top mentoring and pro bono programs by Euromoney


We take sustainability very seriously at Fenwick. Like many of our clients, we are adopting policies that reduce consumption and waste, and improve efficiency. By using technologies developed by a number of our cleantech clients, we are at the forefront of implementing sustainable policies and practices that minimize environmental impact. In fact, Fenwick has earned recognition in several areas as one of the top US law firms for implementing sustainable business practices.  MORE >

At Fenwick, we have a passion for excellence and innovation that mirrors our client base. Our firm is making revolutionary changes to the practice of law through substantial investments in proprietary technology tools and processes—allowing us to deliver best-in-class legal services more effectively.   MORE >

Mountain View Office
Silicon Valley Center
801 California Street
Mountain View, CA 94041

San Francisco Office
555 California Street
13th Floor
San Francisco, CA 94104

Seattle Office
1191 Second Avenue
10th Floor
Seattle, WA 98101

New York Office
1211 Avenue of the Americas
32nd Floor
New York, NY 10036

Shanghai Office
Unit 908, 9/F, Kerry Parkside Office
No. 1155 Fang Dian Road
Pudong New Area, Shanghai 201204
P.R. China
+86 21 8017 1200

Antonia L. Sequeira

Partner, Intellectual Property  

Mountain View 650.335.7185



Antonia Sequeira focuses her practice on patent prosecution, counseling, analysis and litigation. Her technology focus includes medical and biotechnology device, digital health/health IT, laboratory automation, bioscience, biopharmaceutical, software, and Internet areas.

Antonia’s practice involves preparing and prosecuting U.S. and international patents, post grant proceedings, intellectual property litigation, performing due diligence and freedom to operate analyses, drafting opinions on non-infringement and patent validity, product development counseling, licensing, and patent portfolio analyses. Her clients include large corporations, startup companies, venture capitalists, and universities.

Representative health technologies handled by Antonia include:

Medical or biotechnology device

  • cardiac valves
  • electrolytically detachable coils for treatment of brain aneurysms
  • lens capsulotomy and cataract surgery devices
  • catheters
  • pill identification instruments
  • liquid transfer robotics
  • tissue resurfacing lasers
  • portable ventilators
  • biochips
  • stroke treatment devices
  • cardiac surgery devices
  • biopsy devices
  • diabetes care devices
  • blood filtering devices
  • tonometry devices
  • biosensors
  • medical imaging

Digital health/health IT / mHealth

  • hospital workflow software
  • patient records management software
  • pill identification software
  • wearable health devices
  • informatics for personalized medicine
  • consumer/patient mobile and desktop applications
  • doctor/hospital facing mobile and desktop applications

Antonia also has significant patent prosecution, counseling, and litigation experience in a wide range of other technologies, including molecular biology, genomics, proteomics, genomic diagnostics, clean technology, social networking, computer security, electronic commerce, and other software and Internet technologies.

Antonia has years of training and experience in the medical and biotechnology areas. She received her Bachelor of Science summa cum laude from California Polytechnic State University in San Luis Obispo, with a concentration on anatomy and physiology/biomedical areas. Antonia has worked in diverse medical environments, including in a clinical laboratory as a certified phlebotomist and as a researcher on the Drosophila Genome Project at the Lawrence Berkeley National Laboratory.

A graduate of the Boalt School of Law at U.C. Berkeley in 2002, Antonia served as an Associate Editor and Annual Review Editor for the Berkeley Technology Law Journal, was awarded a fellowship from the Berkeley Center of Law and Technology, and spent a semester as a teaching advisor for Boalt’s Law and Technology Writing Seminar. While in law school, Antonia was one of the founders of a biotechnology startup company, Aprotea Biochips, Inc., that developed a microelectromechanical systems (MEMS) biochip for high-throughput drug synthesis and screening.

Antonia's publications and speaking engagements include:

  • ​Antonia L. Sequeira, Patent Strategies in the Digital Health Care Space, Daily Journal, July 10, 2015.
  • XX in Health Retreat, 2014 Speaker, Best Patent Practices for Digital Health Startups
  • Antonia L. Sequeira, Don’t Just Patent Everything, You Need to Have a Strategy, Daily Journal, April 17, 2013.
  • Antonia L. Sequeira, Patentability Black Hole, Daily Journal, March 10, 2011.
  • Antonia L. Sequeira, EPA Regulations Change, Limiting Trade Secret Protection of Chemicals, Intellectual Property Bulletin, Fenwick & West, LLP, Fall Bulletin 2010.
  • Antonia L. Sequeira, The Inevitable Disclosure Doctrine Lives On, Intellectual Property Bulletin, Fenwick & West, LLP, Spring Bulletin 2010.
  • Antonia L. Sequeira, Federal Patent Law Does Not Protect Patentees from State Trade Secret Misappropriation Claims, Intellectual Property Bulletin, Fenwick & West, LLP, Spring Bulletin 2009.
  • Antonia L. Sequeira, Disclosure of Pricing Information in Government Contract Prevented under FOIA Exemption, Intellectual Property Bulletin, Fenwick & West, LLP, Spring Bulletin 2008.
  • Antonia L. Sequeira, American Inventors Need Patent System with Greater Transparency, Fairness, Los Angeles Daily Journal, September 7, 2007.
  • Antonia L. Sequeira, Court Compels Google to Release Search Engine Data, Intellectual Property Bulletin, Fenwick & West, LLP, Summer Bulletin 2006.
  • Antonia L. Sequeira, Federal Circuit Requires Clear Assertion of Lexicographer Rule, Los Angeles Daily Journal, April 18, 2005.
  • Antonia L. Sequeira, Wal-Mart Stores, Inc. v. Samara Bros., 16 Berkeley Tech. L.J. 251 (2001).