Patents by Inventor Ewan Chi Yuen Cheung

Ewan Chi Yuen 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).

  • Pyrotechnic rocket
    Patent number: D409709
    Type: Grant
    Filed: June 1, 1998
    Date of Patent: May 11, 1999
    Assignee: Inter-Oriental Pyrotechnic, Ltd.
    Inventor: Ewan Chi Yuen Cheung
  • Pyrotechnic rocket
    Patent number: D412731
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: August 10, 1999
    Assignee: Inter-Oriental Pyrotechnic Ltd.
    Inventor: Ewan Chi Yuen Cheung
  • Pyrotechnic rocket
    Patent number: D412961
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: August 17, 1999
    Assignee: Inter-Oriental Pyrotechnic, Ltd.
    Inventor: Ewan Chi Yuen Cheung
  • Pyrotechnic rocket
    Patent number: D414836
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: October 5, 1999
    Assignee: Inter-Oriental Pyrotechnic, Ltd.
    Inventor: Ewan Chi Yuen Cheung