Patents by Inventor Herman Chan

Herman Chan 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).

  • Toy guitar
    Patent number: D438261
    Type: Grant
    Filed: May 8, 2000
    Date of Patent: February 27, 2001
    Assignee: Potex Toys Manufacturer Ltd.
    Inventor: Ho Man Herman Chan
  • Voice synthesizer
    Patent number: D441003
    Type: Grant
    Filed: May 10, 2000
    Date of Patent: April 24, 2001
    Assignee: Potex Toys Manufacturer Ltd.
    Inventor: Ho Man Herman Chan
  • Toy guitar
    Patent number: D457573
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: May 21, 2002
    Assignee: Potex Toys Manufacturer Ltd.
    Inventor: Ho Man Herman Chan
  • Voice synthesizer
    Patent number: D461837
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: August 20, 2002
    Assignee: Potex Toys Manufacturer Ltd.
    Inventor: Ho Man Herman Chan