William P. O'Sullivan - Manchester, NH
Attorney at Sheehan Phinney
Intellectual Property Lawyers in Manchester, NH
1000 Elm Street 17th Floor Manchester, NH 03101
- 1 Super Lawyers®
-
21
Years
Experience
Manchester Intellectual Property Lawyer
Updated: 03/10/2026
Areas of Practice
- Intellectual Property
- Startups/BOOST
Attorney Information
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.
Awards and Honors
Honors
- Rising Star by New England Super Lawyers®, Intellectual Property
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
Education
-
Legal Education
-
Rutgers School of Law - Camden,
Camden,
New Jersey, 2004
J.D.
-
Rutgers School of Law - Camden,
Camden,
New Jersey, 2004
-
Non Legal Education
-
State University of New York Maritime College,
Fort Schuyler, 1994
B.E.
Major: Electrical Engineering -
Rensselaer Polytechnic Institute
Honors: Graduate Level Engineering Coursework
-
State University of New York Maritime College,
Fort Schuyler, 1994
Current Employment Position(s)
-
Shareholder
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
Published Works
Articles
-
Client Alert: USPTO Transitioning To Electronically Granted Patents
-
When Machines Invent (page 29)
-
Inequitable Conduct and the Duty to Disclose, Belcher Pharmaceuticals, LLC v. Hospira, Inc.
-
Business NH Magazine: Patent Tips for Entrepreneurs
-
NH Legal Perspective: Patent Considerations for Startup Companies
Bar Admissions
- New Jersey
- New York, 2007
- U.S. Patent and Trademark Office, 2006
- New Hampshire
Other Affiliations
- New Hampshire Bar, Intellectual Property section
Photo
Contact
1000 Elm Street
17th Floor
Manchester, NH 03101
Phone: 603-945-9922
Fax: 603-627-8121
Email: Send a message
Website: https://www.sheehan.com/
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