Patents by Inventor Kai S. Mak

Kai S. Mak 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).

  • Drawing toy
    Patent number: D279489
    Type: Grant
    Filed: March 16, 1983
    Date of Patent: July 2, 1985
    Assignee: Hop Lee Cheong Industrial Co. Ltd.
    Inventor: Kai S. Mak
  • Drawing toy
    Patent number: D279490
    Type: Grant
    Filed: March 16, 1983
    Date of Patent: July 2, 1985
    Assignee: Hop Lee Cheong Industrial Co. Ltd.
    Inventor: Kai S. Mak
  • Toy bubble gun
    Patent number: D309759
    Type: Grant
    Filed: February 21, 1989
    Date of Patent: August 7, 1990
    Assignee: Hop Lee Cheong Ind. Co., Ltd.
    Inventor: Kai S. Mak