Patents by Inventor Ling Feng Zhang

Ling Feng Zhang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Breath alcohol tester
    Patent number: D724979
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: March 24, 2015
    Assignee: Alcohol Countermeasure Systems (International) Inc.
    Inventors: Feisal Hurzook, Ling Feng Zhang, Muc Dang