About Peter

Comprehensive intellectual property litigator

Peter Klepacz provides litigation counsel to clients with a focus on patent, trademark and copyright litigation. His litigation practice extends past intellectual property (IP) law into the intersection with commercial law and covers a variety of industries, including:

  • Beverages and nutritional supplements
  • Clothing and apparel
  • Computer software
  • Medical devices
  • Commercial manufacturing

Prior to joining Quarles, Peter prosecuted patent, trademark and copyright applications, which equips him with an intimate knowledge of the statutory requirements and a special perspective on how to protect and assert IP rights in litigation and appeals.

When advising clients, Peter takes a pragmatic approach and advocates practical business solutions rather than purely legal ones to achieve clients’ goals. Outcomes matter most when it comes to litigation, which is why Peter takes a results-oriented approach and uses his unique outlook of what matters most to decision makers, gained while serving as a judicial intern for the late Justice Shirley Abrahamson on the Wisconsin Supreme Court, to craft legal arguments focused on the issues and facts that matter the most.

Experience in Action

  • Handles opposition and cancellation proceedings before the Trademark Trial and Appeal Board (TTAB).
  • Defends patents from invalidation in inter partes review proceedings before the Patent Trial and Appeal Board (PTAB).
  • Defends and asserts IP rights in federal district court.


  • Helped secure a finding of liability against a counterfeiter on summary judgment and secure substantial damages at trial.
  • Achieved a consent agreement where party agreed to change description of products in catalog and include disclaimer stating there was no affiliation between the parties.

Professional & Civic Activities

  • Wisconsin Supreme Court Justice Shirley S. Abrahamson, judicial intern (2019)
  • Registered as a patent attorney with the U.S. Patent & Trademark Office

News & Insights

  • "Regulation of Cardiac fibroblast transformation and collagensynthesis by gain of function RAF1 mutation"
    Academic Surgical Congress Abstracts


Bar Admissions

Court Admissions


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