Areas of Practice


Intellectual Property Litigation

Intellectual Property Law​


General Civil Litigation


Corporate Law


     Louis represents clients in a variety of areas, including litigation, counseling, opinions, due diligence, licensing and transactions, prosecution, patent reissue and reexamination; his experience includes counseling and litigating commercial business matters, patent, trademark and copyright matters, as well as licenses, unfair competition, and trade secret matters.


     Louis has extensive experience assisting clients in communications, telecommunications, stock and option exchanges, technology, medical, biotechnology, pharmaceuticals, security, gaming, insurance, packaging, advanced materials, software and software systems, health care, power generation, luxury goods, food and diet, entertainment, and fashion industries. Additionally, Louis has led patent portfolio development and monetization licensing and litigation matters resulting in hundred of millions of dollars for his clients.


     Louis has been honored on a number of occasions for his contributions to the legal profession. He has been named Best Lawyer in Intellectual Property every year since 1999, and Best Lawyer in the Bay Area in Intellectual Property from 2003 to 2005. He is listed in Chambers as Leading Lawyer in IP, was named a Super Lawyer in both Washington D.C. and Pennsylvania, and is listed in the top 250 worldwide lawyers in IAM’s leading Intellectual Property licensing and trademark attorney listings. In 2011, he was elected a member of The Cosmos Club.


    Louis received his bachelor’s degree in metallurgical engineering from Drexel University. He earned his J.D. from Temple University Beasly School of Law. He is a registered patent attorney with the U.S. Patent Trademark Office. 


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Bar Admissions

  • District of Columbia

  • New York

  • Pennsylvania

  • United States Patent and Trademark Office



  • Temple University School of Law J.D.

  • Drexel University B.S.


Industry Sectors

  • Energy & Utilities

  • Health Care & Life Sciences

  • Insurance

  • Media & Entertainment

  • Venture Capital/Private Equity


Court Admissions

  • U.S. Court of Appeals for the Federal Circuit

  • U.S. Court of Appeals for the Ninth Circuit

  • U.S. Court of Appeals for the Third Circuit

  • U.S. District Court - Arizona

  • U.S. District Court - Delaware

  • U.S. District Court -- Eastern District of Pennsylvania

  • U.S. District Court -- Idaho

  • U.S. District Court -- Middle District or Pennsylvania

  • U.S. District Court New Jersey

  • U.S. District Court -- Northern District of Georgia

  • U,S. District Court -- Northern District of Illinois

  • U,S. District Court -- Northern District of New York

  • U.S. District Court -- Southern

    District of New York

  • U.S. District Court -- Western District of Pennsylvania



  • American Intellectual Property



  • International Trademark Association


Contact Info


1 215 284 8910


Pennsylvania Office
Louis M. Heidelberger Esquire

1229 Laurel Oak Lane

York, PA 17403




Louis Heidelberger Law Offices

Intellectual Property, Corporate Law,

and Civil Litigation

Bar Affiliations:  DC, NY, PA & USPTO