Joseph T Leone

Co-chair of the Intellectual Property Group at DeWitt LLP

Clients around the world turn to Joseph T Leone to secure and enforce their IP rights. This includes securing patents, trademarks, copyright and trade secrets, as well as asserting and defending these rights in the state and federal courts. Mr Leone is frequently engaged in opinion work, drafting freedom-to-operate opinions for US manufacturers and foreign companies importing goods into the United States. He serves as an expert witness in state and federal actions regarding Patent and Trademark Office practices and procedures. Additionally, he regularly represents both applicants and opposers in actions before the Trademark Trial and Appeal Board.

Mr Leone’s education includes earning a JD from Marquette University, an MS in organic chemistry from Marquette University and an AB in chemistry from Kenyon College.


Mr Leone’s clients run the gamut from multinational corporations and large research universities to start-ups and individual inventors. Recent clients for whom Mr Leone drafted patent applications includes Silatronix, COnovate, Auburn University, University of Saint Thomas, Evets Corporation (maker of Danelectro-brand guitars) and Modern Fence Company. Mr Leone’s trademark clients include Evets Corporation, Diesel Forward, Sonic Foundry and Country Kitchen Restaurants, among many others.

Notable representations

In patent litigation, Mr Leone currently represents the defendants and counter-claim plaintiffs Proclip USA and Brodit in an infringement suit involving three patents, lodged in the Western District of Wisconsin (National Products Inc v Proclip USA Inc, Case no 20-CV-439). In opposition matters before the European Patent Office, Mr Leone recently prevailed in two matters for the same client, Verso Paper Holding LLC. The first was a successful defence of a patent opposition (EP Pat No 2 651 652); the second was a successful defence of an appeal brought by the losing party in an earlier opposition (EPO Boards of Appeal Case no T2557/16-3.3.02). In trademark matters, Mr Leone is currently defending against a trademark opposition on behalf of Sonic Foundry (RLP Ventures LLC v Sonic Foundry Inc, TTAB Case no 91/267,495).

Professional associations

  • American Chemical Society
  • University of Wisconsin Extended Campus
  • Wisconsin Intellectual Property Law Association

Firm details

DeWitt LLP
2 E Mifflin Street
Suite 600
Madison WI 53703
United States

Contact details

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