Panitch Schwarze Belisario & Nadel, LLP

The firm filed 1,837 patent applications from 2023 to 2025. Panitch Schwarze Belisario & Nadel, LLP is a Philadelphia law firm focused on intellectual property law for companies, innovators, and inventors. Its practitioners handle patent and trademark matters, including obtaining IP assets in the United States and internationally. The firm also advises on IP monetization strategies and provides opinions about competitors' intellectual property. For contested matters, it represents clients in U.S. court litigation and proceedings before the Patent Trial and Appeal Board and Trademark Trial and Appeal Board, and coordinates proceedings abroad with foreign associates. The firm reports managing 4,290 active trademarks in 2025 and handling 154 litigations from 2023 to 2025. Its attorneys and agents work across technical disciplines and intellectual property issues.