Patents by Inventor David Chung-Wai Choi

David Chung-Wai Choi 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).

  • Micro-slicer
    Patent number: D424866
    Type: Grant
    Filed: February 18, 1999
    Date of Patent: May 16, 2000
    Assignee: Edu-Science (H.K.) Ltd.
    Inventor: David Chung-Wai Choi
  • Petri dish
    Patent number: D425624
    Type: Grant
    Filed: February 18, 1999
    Date of Patent: May 23, 2000
    Assignee: Edu-Science (H.K.) Ltd.
    Inventor: David Chung-Wai Choi