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Intellectual Property Litigation

Intellectual Property

Walter Haverfield’s intellectual property litigation attorneys provide clients with IP enforcement, protection, and strategic counseling both in the U.S. and abroad. Our intellectual property litigators have successfully represented clients before the U.S. Patent and Trademark Office (USPTO), Federal District Courts, and the Federal Circuit Court of Appeals. Our clients represent a broad spectrum of industries and technologies around the globe.

Practice Group Leader

James J. (Jamie) Pingor, Partner

Jamie focuses his practice on domestic and foreign patent preparation, prosecution, procurement, litigation, as well as trademark analysis, clearance procurement, cancellations, oppositions, and litigation matters.

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Our IP Litigation Difference

Whether defending or enforcing matters related to a client’s patent, trademark, copyright, or trade secrets, Walter Haverfield’s full-service approach is instrumental to protecting against would-be competitors and leveraging their competitive advantage. In other matters, our attorneys initiate challenges of validity related to a competitor’s intellectual property rights to ward off unfair competitive threats.

Whatever a client’s intellectual property litigation needs, we have the experience and knowledge to help, providing representation in all areas of intellectual property litigation, including:

  • Enforcing patent rights in U.S. federal courts
  • Defending against alleged infringement of U.S. patents in U.S. federal courts
  • Protecting patent and trademark rights for the U.S. Customs and Border Protection (CBP) to block the importation of goods infringing on U.S. trademarks registrations and copyrights
  • Filing complaints with the U.S. International Trade Commission seeking orders to block the importation of goods infringing on U.S. patents
  • Enforcing trademark rights in U.S. federal courts
  • Enforcing copyrights in U.S. federal courts
  • Protecting trade secrets in state courts and U.S. federal courts
  • Re-examining patents before the USPTO
  • Cancelling trademark registrations before the USPTO
  • Reviewing inter-party and post-grant validity of patents before the USPTO


  • Preparing numerous patentability, non-infringement, and invalidity opinions
  • Analyzing products in all stages of development to provide freedom-to-operate opinions
  • Performing legal research and analysis related to complex intellectual property issues
  • Drafting patentability and infringement analysis opinions for large and small clients
  • Providing litigation support through claim analysis and opinion work for International Trade Commission Section 337 investigations
  • Drafting freedom-to-operate opinions for emerging businesses with new technology