Atty. John Theodore Whelan

Atty. John Theodore Whelan

John Theodore Whelan is a lawyer practicing intellectual property, corporate/business. John received a B.S.E.E. degree from University of Maryland in 1982, and has been licensed for 39 years.

Prince Frederick Prince Frederick 39 yrs experience 39 year
Call (240) 901-9828 Book Appointment

Profile Summary

About John Theodore Whelan at a glance

John Theodore Whelan is a Member based in Prince Frederick, Maryland, practicing at The Law Office of John T. Whelan, LLC. They have 39+ years of legal experience, licensed to practice since 1987. Their practice focuses on business and ip. Admitted to practice in Virginia (1987), District of Columbia (1993), and Maryland (2004). Educated at George Washington University (J.D., 1987) and University of Maryland (B.S.E.E., 1982). Active member of Rich American Inn of Court. Serands clients in Prince Frederick, MD and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • John Theodore Whelan is a lawyer practicing intellectual property, corporate/business
  • John received a B.S.E.E. degree from University of Maryland in 1982, and has been licensed for 39 years
  • John practices at The Law Office of John T. Whelan, LLC in Prince Frederick, MD

Practice Areas Explained

John Theodore Whelan's Areas of Practice

Each practice area below reflects the types of cases John Theodore Whelan handles, with a brief overview of what that area of law covers.

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

John Theodore Whelan is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Maryland →

Intellectual Property

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

John Theodore Whelan is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in Maryland →

Jurisdictional Context

Why local counsel matters in Maryland

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

Looking for additional Maryland attorneys? Browse all attorneys in Prince Frederick or all attorneys in Maryland.

Frequently Asked

Common questions about John Theodore Whelan

Where is John Theodore Whelan's law office located?
John Theodore Whelan's law practice is located in Prince Frederick, Maryland. The firm is The Law Office of John T. Whelan, LLC. You can contact the office directly through this profile page.
What practice areas does John Theodore Whelan handle?
John Theodore Whelan focuses on business, ip. Each practice area listed reflects experience handling cases of that type in Maryland.
How long has John Theodore Whelan practiced law?
John Theodore Whelan has 39+ years of legal experience and has been licensed since 1987.
Where did John Theodore Whelan go to law school?
John Theodore Whelan earned their education at (J.D., 1987); (B.S.E.E., 1982).
How can I contact John Theodore Whelan for a consultation?
You can contact John Theodore Whelan 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.
George Washington University
- 1987
B.S.E.E.
University of Maryland
- 1982

Bar Admissions

Virginia
Admitted: 1987
District of Columbia
Admitted: 1993
Maryland
Admitted: 2004

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