Patents by Inventor Chen K. Chao

Chen K. Chao 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).

  • Hair control clip
    Patent number: D257792
    Type: Grant
    Filed: March 1, 1979
    Date of Patent: January 6, 1981
    Inventor: Chen K. Chao
  • Wig modelling stand
    Patent number: D284120
    Type: Grant
    Filed: February 9, 1984
    Date of Patent: June 3, 1986
    Assignee: The Artistic Hair Products Company Limited
    Inventor: Chen K. Chao
  • Wig hanger
    Patent number: D374141
    Type: Grant
    Filed: July 19, 1995
    Date of Patent: October 1, 1996
    Assignee: C. K. Hair International Limited
    Inventor: Chen K. Chao