At Wang IP Law Group, P.C. we offer patent opinion services to clients who have been sued without warning, who have recently discovered a pre-existing patent, or who are being sued with actual notice of a patent. We understand that a competent opinion letter from one of our qualified patent attorneys can be a successful defense to a charge of willful infringement.

Our firm has the knowledge and experience necessary to provide our clients with reliable patent opinion letters. Our patent attorneys draft letters on a vast array of patent subjects including:

  • Validity or invalidity of patent studies and opinions;
  • Patentability of an ideas and inventions;
  • Product clearance studies and patent clearance opinions;
  • State-of-the-art studies and formal state-of-the-art opinions; and
  • Infringement and non-infringement studies and opinions.


Wang IP Law Group, P.C. assists clients with Patent Law in the Los Angeles CountyOrange CountySan Gabriel ValleyRiverside CountySan Bernardino County,  San Fernando ValleySan Diego County and San Francisco and San Jose area. Our firm also provides services internationally including representing clients in China, Taiwan, Hong Kong, Japan and Israel. 

To speak with one of our attorneys today, contact us at (888) 827-8880 or email us at