Atty. William P O'Sullivan

Atty. William P O'Sullivan

William P O'Sullivan is a lawyer practicing admiralty / maritime, communications / media, patents. William received a degree from Rensselaer Polytechnic Institute, and has been licensed for 21 years.

Manchester Manchester 21 yrs experience 21 year
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Profile Summary

About William P O'Sullivan at a glance

William P O'Sullivan is a patent, entertainment, and maritime attorney based in Manchester, New Hampshire. They have 21+ years of legal experience, licensed to practice since 2005. Admitted to practice in New Jersey (2005) and New York registered to practice before U.S. Patent and Trademark Office (2007). Educated at Rutgers University School of Law-Newark (J.D., 2004) and Rensselaer Polytechnic Institute Engineering Coursework State University of New York, Maritime College at Fort Schuyler (B.E.E., 1994). Serands clients in Manchester, NH and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • William P O'Sullivan is a lawyer practicing admiralty / maritime, communications / media, patents
  • William received a degree from Rensselaer Polytechnic Institute, and has been licensed for 21 years
  • William practices in Manchester, NH

Practice Areas Explained

William P O'Sullivan's Areas of Practice

Each practice area below reflects the types of cases William P O'Sullivan handles, with a brief overview of what that area of law covers.

Patent Law

William P O'Sullivan is one of 20,749 patent attorneys indexed nationally. Browse patent attorneys in New Hampshire →

Entertainment & Sports Law

Entertainment lawyers for music, film, sports contracts, talent representation, and IP licensing.

William P O'Sullivan is one of 45,946 entertainment attorneys indexed nationally. Browse entertainment attorneys in New Hampshire →

Maritime & Admiralty Law

Maritime attorneys for Jones Act claims, longshore injury, cruise ship cases, and offshore matters.

William P O'Sullivan is one of 11,568 maritime attorneys indexed nationally. Browse maritime attorneys in New Hampshire →

Jurisdictional Context

Why local counsel matters in New Hampshire

Practicing law in New Hampshire. Legal matters in New Hampshire are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Manchester are typically filed in the local municipal court or the appropriate New Hampshire state district court, depending on subject matter and amount in controversy. An attorney licensed in New Hampshire brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in New Hampshire courts without local counsel or pro hac vice admission.

Looking for additional New Hampshire attorneys? Browse all attorneys in Manchester or all attorneys in New Hampshire.

Frequently Asked

Common questions about William P O'Sullivan

Where is William P O'Sullivan's law office located?
William P O'Sullivan's law practice is located in Manchester, New Hampshire. You can contact the office directly through this profile page.
What practice areas does William P O'Sullivan handle?
William P O'Sullivan focuses on patent, entertainment, maritime. Each practice area listed reflects experience handling cases of that type in New Hampshire.
How long has William P O'Sullivan practiced law?
William P O'Sullivan has 21+ years of legal experience and has been licensed since 2005.
Where did William P O'Sullivan go to law school?
William P O'Sullivan earned their education at (J.D., 2004); (B.E.E., 1994).
How can I contact William P O'Sullivan for a consultation?
You can contact William P O'Sullivan directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Education

J.D.
Rutgers University School of Law-Newark
- 2004
B.E.E.
Rensselaer Polytechnic Institute Engineering Coursework State University of New York, Maritime College at Fort Schuyler
- 1994

Bar Admissions

New Jersey
Admitted: 2005
New York registered to practice before U.S. Patent and Trademark Office
Admitted: 2007

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