Patents Assigned to Hop Lee Cheong Industrial Co. Ltd.
  • Child's magic drawing board
    Patent number: 5393231
    Abstract: A magic drawing board comprises a base, an opaque sheet mounted on the base, a flexible transparent sheet anchored along one edge thereof to the base, and a coupling mechanism comprising a coupling element on the base and a mating coupling element on the opposite edge of the transparent sheet for locating the transparent sheet in superposed position on the opaque sheet under uniform tension over the area of superposition, resulting in a higher quality image.
    Type: Grant
    Filed: June 1, 1992
    Date of Patent: February 28, 1995
    Assignee: Hop Lee Cheong Industrial Co. Ltd.
    Inventor: Kai-Shun Mak
  • 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
  • Drawing board
    Patent number: D345177
    Type: Grant
    Filed: October 20, 1992
    Date of Patent: March 15, 1994
    Assignee: Hop Lee Cheong Industrial Co Ltd
    Inventor: Kai-Shun Mak
  • Drawing board
    Patent number: D356824
    Type: Grant
    Filed: August 25, 1993
    Date of Patent: March 28, 1995
    Assignee: Hop Lee Cheong Industrial Co., Ltd.
    Inventor: Kai-Shun Mak
  • Drawing board
    Patent number: D358608
    Type: Grant
    Filed: October 20, 1992
    Date of Patent: May 23, 1995
    Assignee: Hop Lee Cheong Industrial Co. Ltd.
    Inventor: Kai-Shun Mak
  • Table for educational games
    Patent number: D399680
    Type: Grant
    Filed: June 13, 1997
    Date of Patent: October 20, 1998
    Assignee: Hop Lee Cheong Industrial Co., Ltd.
    Inventor: Kai-Shun Mak