Patents by Inventor Ko A. Chang

Ko A. 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).

  • Lamp holder having a vase-shaped cracked body
    Patent number: 5121313
    Abstract: A lamp holder having a cracked vase-shaped body with irregular fragments formed thereon to produce a special visual affect. It uses a protecting cover positioned on the top of the vase to even out the fastening compression forces, and a resilient ring member is placed between and in registration with the rim portion of the vase and a recess formed in the facing side of the protecting cover to absorb and evenly distribute compression or impact forces to the vase, and prevent further crack propagation.
    Type: Grant
    Filed: July 23, 1991
    Date of Patent: June 9, 1992
    Inventor: Ko A. Chang
  • Halogen desk lamp
    Patent number: D320865
    Type: Grant
    Filed: October 6, 1989
    Date of Patent: October 15, 1991
    Inventor: Ko A. Chang