Professional Biography

Maurice J. Pirio Partner

  • Seattle

    D +1.206.359.8548

    F +1.206.359.9548


    1201 Third Avenue, Suite 4900

    Seattle, WA 98101-3099




Maurice Pirio is a partner with the firm's Patent practice. Maurice has over 20 years of legal experience and 10 years of technical experience. His practice focuses on protecting the inventions of his clients. He assists his clients by analyzing their technologies, developing strategies for protecting their inventions, and implementing those strategies in the United States and internationally. Maurice also advises his clients on infringement, invalidity, litigation, valuation, due diligence, and acquisition issues. Recently, Maurice’s practice has been focusing on blockchain technologies such as bitcoin, distributed ledgers, and smart contracts; machine learning technologies, such as neural networks, convolutional neural networks, and support vector machines; and unmanned aerial vehicle technologies such as navigation and object detection algorithms.

He has represented a variety of institutions, including Microsoft,, General Electric, Cray, Boeing, Lawrence Livermore National Laboratory, HTC, University of Washington and University of Illinois. Maurice’s educational background, which includes computer-related B.S. and M.S. degrees, provides him with a solid foundation in operating systems, computer architecture, theory of computation and algorithmic analyses.

Some of Maurice's career highlights include:

  • Prosecuting the first software patent filed by Microsoft Corporation in the 1980s that covered various operating system techniques
  • Preparing and prosecuting’s 1-Click patents in the United States and internationally
  • A USPTO Board of Patent Appeals and Interferences decision establishing fundamental principles for patentability of mathematical algorithms
  • A Federal Circuit en banc decision overruling prior case law relating to the benefit of the filing date of an earlier-filed application.

He has prosecuted software patents in a wide range of technologies. These include operating systems, compilers, object-oriented programming, natural language processing, encryption, compression, information retrieval, speech recognition, real-time communications, multi-threaded computing, genetic algorithms, parallel algorithms, computer security, graphical user interfaces, computer security, satellite-based system, radar systems, bioinformatics and telecommunications.

Maurice has successfully handled well over 50 appeals before the USPTO Patent Trial and Appeal Board (PTAB).

His litigation experience includes trial and appeal experience. Maurice has testified on validity, non-infringement, and prosecution issues in many lawsuits, including Stac Electronics v. Microsoft Corp., Mentor Graphics Corp. v. Quickturn Design Systems, Inc., and Inc. v., Inc.

A frequent publisher and lecturer in the United States and internationally, Maurice has presented on software-related legal issues, including developing and presenting a multiday Practice Resource Group course on procuring and enforcing software patents.

Professional Recognition

  • Recognized as an IP Star by Managing IP, 2013, 2014, 2016 - 2021
  • Listed in Intellectual Asset Management Patent 1000, 2012 - 2021
  • Named Best Lawyers’ 2012 Seattle Patent Law Lawyer of the Year
  • Listed in Best Lawyers in America 2005 - 2022: Litigation - Patent; Patent Law
  • Listed in Super Lawyers Magazine, “Washington's Super Lawyers,” 2003 - 2021

Professional Leadership

  • Washington State Bar Association
  • American Bar Association
  • Washington State Patent Law Association
  • Association of Computing Machinery (ACM)

Related Employment


  • Seed and Berry LLP, Seattle, WA, Partner, 1994 - 1999
  • Seed and Berry LLP, Seattle, WA, Associate, 1988 - 1994

Technical (1976 - 1986)

  • Lawrence Livermore National Laboratory, Magnetic Fusion Energy Computer Center
  • Boeing Computer Service
  • Independent Consultant





Bar and Court Admissions

  • Washington
  • U.S. Patent and Trademark Office
  • U.S. Court of Appeals for the Federal Circuit


  • Seattle University School of Law, J.D.
  • University of California, Davis, M.S., Computing Science
  • University of California, Riverside, B.S., Applied Science with Computer Science emphasis