Barcelo, Harrison & Walker LLP Logo

Barcelo, Harrison & Walker, LLP

Newport Beach, CA | Palo Alto, CA | Washington, DC

David B. Walker



Printable Bio


Mr. Walker represents high technology clients in intellectual property portfolio matters and government contracts.

Practice Areas

Assesses intellectual property portfolios, evaluates the strength of competitors’ portfolios, evaluates title to intellectual property assets, negotiates licenses, and conducts non-infringement and invalidity studies.

Represents clients in patent, copyright, trademark, domain name, and trade secret disputes; argues appeals before the Board of Patent Appeals and Interferences and the U.S. Court of Appeals for the Federal Circuit.

Assists clients in patent matters in aerospace and defense, satellite design and operations, nuclear engineering, communication networks, signal processing, mechanical, electrical, electronic, medical device, Internet, software, and business methods technologies.

Negotiates and advises clients regarding contracts with government agencies including intellectual property and data rights provisions in accordance with FAR, DFARS, and agency-specific regulations.

Representative Legal Experience

As Administrative Patent Judge on the Board of Patent Appeals and Interferences, authored more than 100 opinions and decided over 400 ex parte appeals addressing the full range of patentability issues in business methods, software, aerospace, mechanical, electro-mechanical, nuclear, and medical device technologies.

As Chief Patent Counsel for the NASA Goddard Space Flight Center, managed the intellectual property portfolio for NASA’s premier earth and space science center, a major hub for earth-space communications.

Supervised a multi-law firm team in the defense of a trade secret misappropriation claim involving launch vehicle technology with a multi-billion-dollar demand for damages.

Member of the litigation team that successfully enforced NTP's wireless email patents against Research In Motion Ltd.'s BlackBerry devices.
Technical Experience

Operational experience in network warfare and nuclear submarines

Master Instructor of Mechanical and Aerospace Engineering, U.S. Naval Academy

Bar and Court Admissions

District of Columbia Bar

Arkansas Bar

U.S. Court of Appeals for the Federal Circuit

U.S. Patent and Trademark Office


Licensed Professional Engineer, Commonwealth of Virginia

Current TS/SCI clearance


J.D., Stanford Law School

M.S.A.A., Stanford University

B.S.A.E., U.S. Naval Academy

Law Journals

Managing Editor,The Stanford Technology Law Review


Law Clerk for the Honorable Haldane Robert Mayer, U.S. Court of Appeals for the Federal Circuit (1999-2001)