Patents by Inventor Lap-Kwan Cheng

Lap-Kwan Cheng 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).

  • Multi-purpose lantern
    Patent number: D276079
    Type: Grant
    Filed: April 5, 1982
    Date of Patent: October 23, 1984
    Assignee: Hang Ho Industrial Co. Limited
    Inventor: Lap-Kwan Cheng
  • Flashlight
    Patent number: D332322
    Type: Grant
    Filed: May 20, 1991
    Date of Patent: January 5, 1993
    Assignee: Hung Chuk Industrial Co. Ltd.
    Inventor: Lap-Kwan Cheng