Atty. Brian Eugene Hennessey

Atty. Brian Eugene Hennessey

Brian Eugene Hennessey is a lawyer practicing intellectual property, patent application, litigation. Brian received a B.S.E. degree from University of Michigan in 1990, and has been licensed for 31 years.

Tarrytown Tarrytown 31 J. Erfahrung 31 year
Call (917) 920-3448 Book Appointment

Profile Summary

About Brian Eugene Hennessey at a glance

Brian Eugene Hennessey is a patent, ip, and litigation attorney based in Tarrytown, New York. They have 31+ years of legal experience, licensed to practice since 1995. Admitted to practice in California (1995) and New York registered to practice before U.S. Patent and Trademark Office (2007). Educated at Hastings College of the Law, University of California (J.D., 1994) and University of Michigan (B.S.E., 1990). Serands clients in Tarrytown, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

Über uns

  • Brian Eugene Hennessey is a lawyer practicing intellectual property, patent application, litigation
  • Brian received a B.S.E. degree from University of Michigan in 1990, and has been licensed for 31 years
  • Brian practices in Tarrytown, NY

Practice Areas Explained

Brian Eugene Hennessey's Areas of Practice

Each practice area below reflects the types of cases Brian Eugene Hennessey handles, with a brief overview of what that area of law covers.

Patent Law

Brian Eugene Hennessey 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.

Brian Eugene Hennessey is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in New York →

Civil Litigation

Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.

Brian Eugene Hennessey is one of 454,532 litigation attorneys indexed nationally. Browse litigation 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 Tarrytown 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 Tarrytown or all attorneys in New York.

Frequently Asked

Common questions about Brian Eugene Hennessey

Where is Brian Eugene Hennessey's law office located?
Brian Eugene Hennessey's law practice is located in Tarrytown, New York. You can contact the office directly through this profile page.
What practice areas does Brian Eugene Hennessey handle?
Brian Eugene Hennessey focuses on patent, ip, litigation. Each practice area listed reflects experience handling cases of that type in New York.
How long has Brian Eugene Hennessey practiced law?
Brian Eugene Hennessey has 31+ years of legal experience and has been licensed since 1995.
Where did Brian Eugene Hennessey go to law school?
Brian Eugene Hennessey earned their education at (J.D., 1994); (B.S.E., 1990).
How can I contact Brian Eugene Hennessey for a consultation?
You can contact Brian Eugene Hennessey 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.
Hastings College of the Law, University of California
- 1994
B.S.E.
University of Michigan
- 1990

Bar Admissions

California
Admitted: 1995
New York registered to practice before U.S. Patent and Trademark Office
Admitted: 2007

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