Mr. Littenberg concentrates his practice in patent licensing and litigation. He has extensive experience in formulating strategies for interrelated intellectual property and business matters, including complex technical and legal issues, and related business matters. He also advises clients on maximizing patent portfolio value, and has extensive experience in licensing of patents, trademarks, and other intellectual property rights.

Mr. Littenberg has advised and chaired groups of major companies in formulating defenses to third-party patents, and implementing such defenses, such as litigation, reexaminations, negotiating favorable licenses, etc. He has also conducted hearings with patent examiners in substantially all of the major countries, and has assisted a Barrister in a British trial.