Patents by Inventor Cha-Chang Liu

Cha-Chang Liu 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).

  • Cross bow having a safety device
    Patent number: 5215069
    Abstract: A cross bow including a string engaged to a bow prod of a stock, a pair of bars for drawing the string to a cocked position, a butt pivotally coupled to the rear end of the stock, a recess formed in the rear end of the stock, a member disposed on the rear end of the stock and including two depressions, a trigger disposed in the stock and including a shoulder, and a lever pivotally supported in the stock having one end engageable with either of the depressions and the other end engageable with the shoulder of the trigger so as to lock the trigger.
    Type: Grant
    Filed: January 29, 1992
    Date of Patent: June 1, 1993
    Inventor: Cha-Chang Liu