Atty. William Mark Mullineaux

Atty. William Mark Mullineaux

William Mark Mullineaux is a lawyer practicing patent infringement, family, trademark infringement and 5 other areas of law. William received a B.S. degree from Shippensburg University in 1981, and has been licensed for 42 years.

Philadelphia Philadelphia 42 yrs experience 42 year
Call (484) 573-2871 Book Appointment

Profile Summary

About William Mark Mullineaux at a glance

William Mark Mullineaux is a Partner based in Philadelphia, Pennsylvania, practicing at Astor Weiss Kaplan & Mandel, LLP. They have 42+ years of legal experience, licensed to practice since 1984. Their practice focuses on patent, trademark, family law, business, and m&a. Admitted to practice in Pennsylvania (1984) and U.S. District Court, Eastern and Middle Districts of Pennsylvania, U.S. Court of Appeals, Third Circ (1984). Educated at University of Notre Dame (J.D., 1984) and Shippensburg University (B.S., 1981). Active member of Pennsylvania (Member, Sections on: Civil Litigation Intellectual Property) and American (Member, Sections on: Business Law Litigation Co-Chairman, Mid-Atlantic Region, Business Torts Committee, Intellectual Property Law Section) Bar Associations. Serands clients in Philadelphia, PA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • William Mark Mullineaux is a lawyer practicing patent infringement, family, trademark infringement and 5 other areas of law
  • William received a B.S. degree from Shippensburg University in 1981, and has been licensed for 42 years
  • William practices at Astor Weiss Kaplan & Mandel, LLP in Philadelphia, PA

Practice Areas Explained

William Mark Mullineaux's Areas of Practice

Each practice area below reflects the types of cases William Mark Mullineaux handles, with a brief overview of what that area of law covers.

Patent Law

William Mark Mullineaux is one of 20,749 patent attorneys indexed nationally. Browse patent attorneys in Pennsylvania →

Trademark Law

William Mark Mullineaux is one of 23,222 trademark attorneys indexed nationally. Browse trademark attorneys in Pennsylvania →

Family Law

Family law attorneys handle divorce, child custody, child support, adoption, prenups, and protective orders. Find verified family lawyers near you.

William Mark Mullineaux is one of 187,066 family law attorneys indexed nationally. Browse family law attorneys in Pennsylvania →

Business & Corporate Law

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

William Mark Mullineaux is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Pennsylvania →

Mergers & Acquisitions

William Mark Mullineaux is one of 49,731 m&a attorneys indexed nationally. Browse m&a attorneys in Pennsylvania →

Jurisdictional Context

Why local counsel matters in Pennsylvania

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

Looking for additional Pennsylvania attorneys? Browse all attorneys in Philadelphia or all attorneys in Pennsylvania.

Frequently Asked

Common questions about William Mark Mullineaux

Where is William Mark Mullineaux's law office located?
William Mark Mullineaux's law practice is located in Philadelphia, Pennsylvania. The firm is Astor Weiss Kaplan & Mandel, LLP. You can contact the office directly through this profile page.
What practice areas does William Mark Mullineaux handle?
William Mark Mullineaux focuses on patent, trademark, family law, business, m&a. Each practice area listed reflects experience handling cases of that type in Pennsylvania.
How long has William Mark Mullineaux practiced law?
William Mark Mullineaux has 42+ years of legal experience and has been licensed since 1984.
Where did William Mark Mullineaux go to law school?
William Mark Mullineaux earned their education at (J.D., 1984); (B.S., 1981).
How can I contact William Mark Mullineaux for a consultation?
You can contact William Mark Mullineaux 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.
University of Notre Dame
- 1984
B.S.
Shippensburg University
- 1981

Bar Admissions

Pennsylvania
Admitted: 1984
U.S. District Court, Eastern and Middle Districts of Pennsylvania, U.S. Court of Appeals, Third Circ
Admitted: 1984

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