Atty. Denis James Sullivan

Atty. Denis James Sullivan

Denis James Sullivan is a lawyer practicing patent infringement, intellectual property litigation, patents. Denis received a B.S.E.E. degree from Manhattan College in 1993, and has been licensed for 23 years.

Syracuse Syracuse 23 yrs experience 23 year
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Profile Summary

About Denis James Sullivan at a glance

Denis James Sullivan is a Partner based in Syracuse, New York, practicing at Barclay Damon, LLP. They have 23+ years of legal experience, licensed to practice since 2003. Their practice focuses on patent and ip. Admitted to practice in New York U.S. Court of Appeals, Federal Circuit registered to practice before U.S. Patent and Tradem (2003) and U.S. District Court, Northern, Southern, Eastern and Western Districts of New York (2003). Educated at New York Law School (J.D., 2002) and Manhattan College (B.S.E.E., 1993). Recognitions include Peer Reviewed. Active member of New York State Bar Association, Federal Circuit Bar Association, American Intellectual Property Law Association. Serands clients in Syracuse, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Denis James Sullivan is a lawyer practicing patent infringement, intellectual property litigation, patents
  • Denis received a B.S.E.E. degree from Manhattan College in 1993, and has been licensed for 23 years
  • Denis practices at Barclay Damon, LLP in Syracuse, NY

Practice Areas Explained

Denis James Sullivan's Areas of Practice

Each practice area below reflects the types of cases Denis James Sullivan handles, with a brief overview of what that area of law covers.

Patent Law

Denis James Sullivan is one of 20,749 patent attorneys indexed nationally. Browse patent attorneys in New York →

Intellectual Property

IP attorneys protect inventions, brands, and creative work through patent prosecution, trademark registration, copyright, and trade-secret enforcement.

Denis James Sullivan is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in New York →

Jurisdictional Context

Why local counsel matters in New York

Practicing law in New York. Legal matters in New York are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Syracuse are typically filed in the local municipal court or the appropriate New York state district court, depending on subject matter and amount in controversy. An attorney licensed in New York 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 York courts without local counsel or pro hac vice admission.

Looking for additional New York attorneys? Browse all attorneys in Syracuse or all attorneys in New York.

Frequently Asked

Common questions about Denis James Sullivan

Where is Denis James Sullivan's law office located?
Denis James Sullivan's law practice is located in Syracuse, New York. The firm is Barclay Damon, LLP. You can contact the office directly through this profile page.
What practice areas does Denis James Sullivan handle?
Denis James Sullivan focuses on patent, ip. Each practice area listed reflects experience handling cases of that type in New York.
How long has Denis James Sullivan practiced law?
Denis James Sullivan has 23+ years of legal experience and has been licensed since 2003.
Where did Denis James Sullivan go to law school?
Denis James Sullivan earned their education at (J.D., 2002); (B.S.E.E., 1993).
How can I contact Denis James Sullivan for a consultation?
You can contact Denis James 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.
What awards or recognition has Denis James Sullivan received?
Denis James Sullivan's notable recognition includes: Peer Reviewed.

Education

J.D.
New York Law School
- 2002
B.S.E.E.
Manhattan College
- 1993

Awards

Peer Reviewed

Bar Admissions

New York U.S. Court of Appeals, Federal Circuit registered to practice before U.S. Patent and Tradem
Admitted: 2003
U.S. District Court, Northern, Southern, Eastern and Western Districts of New York
Admitted: 2003

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