Patents by Inventor Chiung-Chang Tsai

Chiung-Chang Tsai 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).

  • Screwdriver assembly
    Publication number: 20020170394
    Abstract: A screwdriver assembly includes a first screwdriver and a second screwdriver connected to each other. The two screwdrivers have different specifications to be used in different working conditions and are packaged and marketed together to reduce the packaging cost.
    Type: Application
    Filed: May 15, 2001
    Publication date: November 21, 2002
    Inventor: Chiung-Chang Tsai
  • Screwdriver assembly with an extendable rod
    Patent number: 6405396
    Abstract: A screwdriver assembly includes a first handle having a first hollow shank axially inserted into the first handle for connecting a tip and a second handle detachably secured in one end of the first handle opposite to the hollow shank. A second hollow shank is axially inserted into the second handle for connecting an extendable rod. The extendable rod includes one end opposite to the second handle and having a magnet secured to retrieve an object, such as a bolt, from a confined space such as a deep hole.
    Type: Grant
    Filed: May 30, 2001
    Date of Patent: June 18, 2002
    Inventor: Chiung-Chang Tsai
  • Handle for a hand tool
    Patent number: D441269
    Type: Grant
    Filed: June 22, 2000
    Date of Patent: May 1, 2001
    Inventor: Chiung-Chang Tsai
  • Handle for a hand tool
    Patent number: D531006
    Type: Grant
    Filed: January 9, 2006
    Date of Patent: October 31, 2006
    Inventor: Chiung-Chang Tsai
  • Handle of hand tool
    Patent number: D465986
    Type: Grant
    Filed: January 8, 2002
    Date of Patent: November 26, 2002
    Inventor: Chiung-Chang Tsai
  • Tool suspension plate
    Patent number: D486381
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: February 10, 2004
    Inventor: Chiung-Chang Tsai
  • Tool handle
    Patent number: D408258
    Type: Grant
    Filed: March 13, 1998
    Date of Patent: April 20, 1999
    Inventor: Chiung Chang Tsai