Charles T.J. Weigell III

Charles Weigell’s deep experience in protecting products at the intersection of trademarks, copyrights, and design patents is invaluable — both for fashion and fragrance clients and for clients with technical products like machinery, digital icons, tools, and medical and dental devices, for which it is especially important to secure the proper IP protection.

Charles has extensive experience advising clients on issues involving three-dimensional marks, functionality, design searching, demonstrating secondary meaning, and the interface between design and utility patent protections. He also has deep knowledge of the new standards for prior art, prior disclosures, anticipation, and obviousness under the America Invents Act.

In addition to handling searching, clearance, filing, and prosecution of trademarks, Charles provides advice and counseling on trade dress and manages large trademark portfolios. He writes design patent validity and infringement opinions, and advises on oppositions, cancellations, and concurrent use matters before the USPTO’s Trademark Trial and Appeal Board, as well as appeals before the Patent Trial and Appeal Board.