Patents by Inventor Anthony Yi Choi Cheung

Anthony Yi Choi Cheung 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).

  • Star-shaped light bulb
    Patent number: D381440
    Type: Grant
    Filed: August 23, 1994
    Date of Patent: July 22, 1997
    Inventor: Anthony Yi Choi Cheung
  • Heart-shaped light bulb
    Patent number: D381441
    Type: Grant
    Filed: August 23, 1994
    Date of Patent: July 22, 1997
    Inventor: Anthony Yi Choi Cheung