Patents by Inventor Walter W. Hsu

Walter W. Hsu 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).

  • Combined punch and clip
    Patent number: 4802789
    Abstract: A combined punch and clip has a base, a pair of punching elements, a pair of locking apparatuses, and a clipping shank. The base has a rectangular, flat and hollow shape; the punching elements and the locking apparatuses are symmetrically provided on the left and right sides of the base. The former are employed to punch two holes on a stack of paper to be collected, and the latter are employed to adjust the state of this invention either in a punching or in a storing state. The clipping shank is employed to secure the punched paper.
    Type: Grant
    Filed: May 12, 1988
    Date of Patent: February 7, 1989
    Inventor: Walter W. Hsu
  • Staple remover
    Patent number: D360565
    Type: Grant
    Filed: April 8, 1994
    Date of Patent: July 25, 1995
    Assignee: Welter's Co., Ltd.
    Inventor: Walter W. Hsu
  • Teeth cleaner
    Patent number: D367130
    Type: Grant
    Filed: September 9, 1994
    Date of Patent: February 13, 1996
    Assignee: Welter's Co., Ltd.
    Inventor: Walter W. Hsu