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William P. O'Sullivan - Manchester, NH

1000 Elm Street17th Floor Manchester, NH 03101

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Updated: 05/14/2025

Manchester Intellectual Property Lawyer

Overview

William "Bill" O'Sullivan is a member of the firm's Patent Group. He provides strategic counseling on a broad range of intellectual property issues, with an emphasis on patent prosecution and related counseling on inventions relating to electrical, mechanical, optical and software technologies for domestic and international clients. Bill's practice also involves due diligence studies, freedom-to-operate investigations, and infringement and validity opinions, as well as post-grant challenges to the validity of issued patents.

Bill's practice also involves trademark prosecution and related counseling.

Prior to joining the firm, Bill was a Principal in the New York office of Fish & Richardson, P.C. He also spent several years working as an electrical engineer and an engineering project manager.

About William P. O'Sullivan

Practice Areas

  • Intellectual Property
  • Startups/BOOST

Current Employment Position(s)

  • Shareholder

Qualifications

Bar Admissions

  • New Jersey
  • New York, 2007
  • U.S. Patent and Trademark Office, 2006
  • New Hampshire

Other Affiliations

  • New Hampshire Bar, Intellectual Property section

Education

  • Rutgers School of Law - Camden, Camden, New Jersey, 2004
    J.D.
  • State University of New York Maritime College, Fort Schuyler, 1994
    B.E.
    Major: Electrical Engineering
  • Rensselaer Polytechnic Institute
    Honors: Graduate Level Engineering Coursework

Past Positions

  • New York University Medical Center, Senior Project Manager, 1999 - 2000
  • Seaworthy/S.W. Electrical Systems/Power Concepts, Electrical Engineer, 1995 - 1999
  • General Dynamics, Engineer, 1994 - 1995
  • Fish & Richardson P.C., Summer Associate, - 2002
  • Fish & Richardson P.C., Law Clerk, 2000 - 2003
  • Fish & Richardson, P.C., Principal

Pro Bono Activities

  • Swim Committee Member, Volunteer, and Competitor, Swim with a Mission, Inc.
  • Member, NH Tech Alliance, Product of the Year Committee
  • Judge, NH Tech Alliance, Entrepreneur of the Year Program

Achievements

Other Sources of Feedback About William P. O'Sullivan

Included on the 2015 New England Super Lawyers list


Past Lists

  • 2014 New England Super Lawyers list

View the profile for William P. O'Sullivan on Super Lawyers

Honors

  • Rising Star by New England Super Lawyers®, Intellectual Property

Photo

Office Information

Address

1000 Elm Street17th Floor Manchester, NH 03101

Fax

  • 603-627-8121

Accepts Credit Cards

Yes

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Firm Address

Fax:
603-627-8121
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1000 Elm Street17th Floor Manchester, NH 03101

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