Atty. Brian Douglas Siff

Atty. Brian Douglas Siff

Brian Douglas Siff is a lawyer practicing intellectual property law, litigation, appeals and 2 other areas of law. Brian received a B.S. degree from Cornell University in 1987, and has been licensed for 36 years.

New York New York 36 yrs experience 36 year
Call (917) 563-6004 Book Appointment

Profile Summary

About Brian Douglas Siff at a glance

Brian Douglas Siff is a Partner based in New York, New York, practicing at Duane Morris LLP. They have 36+ years of legal experience, licensed to practice since 1990. Their practice focuses on patent, real estate, ip, litigation, and appellate. Admitted to practice in Connecticut (1990), New York (1991), and U.S. Court of Appeals for the Federal Circuit and U.S. District Court, Eastern and Southern District (1994). Educated at Washington University School of Law (J.D., 1990) and Cornell University (B.S. Mechanical, 1987). Recognitions include AV Preeminent. Active member of S and Patent Bar Association •Washington University School of Law Intellectual Property Advisory Board. Serands clients in New York, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Brian Douglas Siff is a lawyer practicing intellectual property law, litigation, appeals and 2 other areas of law
  • Brian received a B.S. degree from Cornell University in 1987, and has been licensed for 36 years
  • Brian practices at Duane Morris LLP in New York, NY

Practice Areas Explained

Brian Douglas Siff's Areas of Practice

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

Patent Law

Brian Douglas Siff is one of 20,749 patent attorneys indexed nationally. Browse patent attorneys in New York →

Real Estate Law

Real estate attorneys handle home purchases, sales, commercial transactions, title disputes, and landlord-tenant matters.

Brian Douglas Siff is one of 316,149 real estate attorneys indexed nationally. Browse real estate 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 Douglas Siff 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 Douglas Siff is one of 454,532 litigation attorneys indexed nationally. Browse litigation attorneys in New York →

Appellate Practice

Appellate attorneys for civil and criminal appeals at state and federal court.

Brian Douglas Siff is one of 86,319 appellate attorneys indexed nationally. Browse appellate 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 New York 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 New York or all attorneys in New York.

Frequently Asked

Common questions about Brian Douglas Siff

Where is Brian Douglas Siff's law office located?
Brian Douglas Siff's law practice is located in New York, New York. The firm is Duane Morris LLP. You can contact the office directly through this profile page.
What practice areas does Brian Douglas Siff handle?
Brian Douglas Siff focuses on patent, real estate, ip, litigation, appellate. Each practice area listed reflects experience handling cases of that type in New York.
How long has Brian Douglas Siff practiced law?
Brian Douglas Siff has 36+ years of legal experience and has been licensed since 1990.
Where did Brian Douglas Siff go to law school?
Brian Douglas Siff earned their education at (J.D., 1990); (B.S. Mechanical, 1987).
How can I contact Brian Douglas Siff for a consultation?
You can contact Brian Douglas Siff 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 Brian Douglas Siff received?
Brian Douglas Siff's notable recognition includes: AV Preeminent.

Education

J.D.
Washington University School of Law
- 1990
B.S. Mechanical
Cornell University
- 1987

Awards

AV Preeminent

Bar Admissions

Connecticut
Admitted: 1990
New York
Admitted: 1991
U.S. Court of Appeals for the Federal Circuit and U.S. District Court, Eastern and Southern District
Admitted: 1994

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