Patents by Inventor Chi Sing Tsang

Chi Sing Tsang 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).

  • Shower disk
    Patent number: D513784
    Type: Grant
    Filed: September 8, 2004
    Date of Patent: January 24, 2006
    Assignee: Jing Mei Industrial Holdings Limited
    Inventor: Chi Sing Tsang
  • Foam generator
    Patent number: D483208
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: December 9, 2003
    Assignee: Jing Mei Industrial Holdings Limited
    Inventor: Chi Sing Tsang