William S. Foster, Jr.



William Foster is the go-to attorney for protecting and defending ownership of mechanical technology and electrical innovation. A registered patent attorney, Bill advises on, litigates and prosecutes high numbers of patent infringement cases. His knowledge of high-tech design, engineering and manufacturing enables him to prevail in infringement cases in a wide array of consumer technology goods.

Patent Infringement

Bill’s technology patent practice includes infringement and invalidity analyses, as well as preparing U.S. and foreign patent applications. He conducts patent litigation, including appellate practice, and has appeared before the Federal Circuit and the Patent Trial and Appeals Board in oral argument. His work includes protecting mechanical patents on fuel injectors, household appliances, packaging machinery and automotive emissions systems. His electrical patent defense work addresses memory circuits, wireless transmission systems, data transfer protocols and imaging systems.

Representative Experience

  • Patent infringement case involving disposable brew baskets and in-room beverage service  Courtesy Products, Inc v. Hamilton Beach Brands, Inc. (D. Del.)
  • Patent infringement case involving commercial blender technology  F'real Foods, LLC v. Hamilton Beach Brands, Inc. et al. (D. Del.)
  • Patent infringement cases involving tape label cassettes  Brother Industries, Ltd. v. Chi Kin Wong d/b/a CW Media Pro, Brother Industries, Ltd. v. EZ Replacement Labels, LLC, and Brother Industries, Ltd. v. Sophia Global, LLC, et al.
  • Patent infringement case involving washing machine direct-drive technology  LG Electronics v. ASKO Appliances, Inc. et al.
  • Patent infringement case involving beverage cartridge technology  Keurig, Incorporated v. Kraft Foods, et al.
  • Patent infringement cases involving dental appliances  Total Gard Corporation v. Splintek-PP, Inc. et al.
  • Appeal reversing summary judgment of non-infringement in case involving calculator lid mechanism  Sun Coast Merchandise Corp. et al v. CCL Products Enterprises, Inc.
  • Counsel in patent infringement case involving interface technology for computer peripherals  Infinity Computer Products, Inc. v. Brother International Corp., et al.
  • Counsel in patent infringement case involving WiFi technology, digital audio technology, laser diode technology and semiconductor processing technology  Agere Systems Inc. v. Sony Corporation, et al.
  • Counsel in patent infringement case involving integrated circuit technology Norman IP Holdings, LLC v. Brother International Corporation et al.

Government Contracts

Bill also maintains a government contracts practice, particularly in the area of dispute resolution. He handles bid protests, claims under the Contract Disputes Act and cases of Fifth Amendment takings of private property for public use. Bill advises clients with respect to IP rights under government contracts, including exclusivity under the Small Business Innovation Research (SBIR) program and commercialization of technology under the Bayh-Dole Act related to inventions arising from government-funded research.

Representative Experience

  • Counsel of record asserting contract claims against the Federal Government for environmental cleanup costs, obtained summary judgment for liability ExxonMobil v. United States
  • Advises clients regarding IP and data rights under government contracts, including exclusivity under SBIR and commercialization of technology under Bayh-Dole
  • Advised on prime sub dispute between Compass Group and KBR in the Eastern District of Virginia
  • Negotiated dismissal under authorization and consent clause and walk-away dismissal of patent action for SBIR contractor pursuant to authorization and consent clause AAR Manufacturing, Inc. v. Guild Associates, Inc.
  • Represented third-party defendant defense contractor in 1498 action  Theodore Whitney and High Resolution Optics Corporation v. The United States
  • Represented sub-contractor related to claims against prime contractor under LOGCAP III for provision of dining facilities during Operation Iraqi Freedom in the Eastern District of Virginia

Previous Experience

Before his legal career, Bill served in policy positions in the executive and legislative branches of government, including the Senate Committee on Veterans’ Affairs and the Office of the Secretary of Defense. In addition, Bill clerked for Judge Diane Gilbert Sypolt at the U.S. Court of Federal Claims.


Bar Admissions

District of Columbia
U.S. Patent and Trademark Office

Court Admissions

U.S. Court of Federal Claims
U.S. Court of Appeals for the Fourth Circuit
U.S. Court of Appeals for the Federal Circuit
U.S. District Court for the District of Columbia
U.S. District Court for the Eastern District of Texas


U.S. Court of Federal Claims, Hon. Diane Gilbert Sypolt, 2002-2003


George Mason University School of Law
J.D. cum laude (2002)

University of Notre Dame
B.A. (1995)

Leadership & Community

Pro Bono

As a disabled veteran, Bill is involved with veterans’ pro bono matters and serves on the Veterans Consortium Pro Bono Program, created by Congress to ensure adequate representation of veterans for claims before the U.S. Court of Appeals for Veterans’ Claims and to recruit and train attorneys in the field of veterans’ law. Bill has served on the board of directors since 2012 and became chair of the consortium in 2019.

Professional Associations

  • Northern Virginia Technology Council, Technology Innovations Committee, 2013-present

Civic Activities

  • Arlington Knights Middle School Hockey Club, Treasurer and Secretary


  • Faegre Drinker — Pro Bono Honor Roll, 2020
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