Patents by Inventor Tien-Tzu Chang

Tien-Tzu Chang 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).

  • Collapsible glasses
    Patent number: 5384604
    Abstract: A pair of collapsible glasses comprising two lens frames, a bridge pivotally connected between the two lens frames, two butterfly-shaped connecters respectively pivotally connecting a round front half temple with one of the two lens frame, two front half temples respectively pivotally connected with a rear half temple of a C shape made of elastic material, the two connecters able to be pivotally bent to let the front and the rear half temples stretched outward to fit the size of the face of a wearer, the two lens frames being foldable to the front of the bridge, the two front half temples being foldable to the side of the lens frames, and the rear half temples being foldable to the side of of the front half temples.
    Type: Grant
    Filed: July 28, 1994
    Date of Patent: January 24, 1995
    Inventor: Tien-Tzu Chang
  • Spectacles
    Patent number: D364636
    Type: Grant
    Filed: July 11, 1994
    Date of Patent: November 28, 1995
    Inventor: Tien-Tzu Chang
  • Spectacles
    Patent number: D364637
    Type: Grant
    Filed: July 11, 1994
    Date of Patent: November 28, 1995
    Inventor: Tien-Tzu Chang
  • Spectacles
    Patent number: D364885
    Type: Grant
    Filed: July 11, 1994
    Date of Patent: December 5, 1995
    Inventor: Tien-Tzu Chang