Patents by Inventor Chen H. Tseng

Chen H. Tseng 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).

  • Ballpoint pen
    Patent number: D358420
    Type: Grant
    Filed: March 1, 1994
    Date of Patent: May 16, 1995
    Assignee: Sunmex Import Corporation
    Inventor: Chen H. Tseng
  • Ballpoint pen
    Patent number: D365364
    Type: Grant
    Filed: March 1, 1994
    Date of Patent: December 19, 1995
    Assignee: Sunmex Import Corporation
    Inventor: Chen H. Tseng
  • Ballpoint pen
    Patent number: D372735
    Type: Grant
    Filed: April 3, 1995
    Date of Patent: August 13, 1996
    Assignee: Sunmex Import Corporation
    Inventor: Chen H. Tseng