CLG provides a full range of patent related services including, but not limited to, patent filings and prosecution, infringement and validity opinions, evaluations and due diligence.

CLG provides a full array of trademark related services, including, but not limited to, trademark filings and prosecution, use and registrability opinions.

CLG specializes in obtaining registration of copyrights.

IP Licensing
CLG has extensive experience in obtaining licenses to musical and literary works.

Our Office is located in northwest
DC at the intersection of 13th and M streets, four blocks from the Mount Vernon Square and McPherson Square Metro Stations.

Founded in 2007, Cheng Law Group, PLLC provides comprehensive legal services to a broad range of clients and is committed to providing the highest quality of service in a cost-effective manner.

CLG celebrates its 7th year in operation and wishes to express its heartfelt thanks to its client to their support and consideration over these past 7 years. During this time, CLG has assisted its clients in obtaining over 500 patents before the U.S. Patent and Trademark Office.


USPTO, the European Patent Office and the Japan Patent Office to Expand Patent Prosecution Highway Work Share Program.


CLG Welcomes Patent Associate Sarah Kuhns. Ms. Kuhns is a U.S. intellectual property attorney who has been working in the field of intellectual property for almost 6 years.