Patents by Inventor Lee Ching Tzeng

Lee Ching Tzeng 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).

  • Length correction device
    Patent number: 6061922
    Abstract: A length correction device includes a rail including two side plates formed with two elongated slots and two fixing blocks fixedly mounted between said side plates, a seat including a main body, a collar, a packing and a knob, a rectangular block formed with a threaded hole and a recess at one side thereof and two pin holes and a threaded hole at a lateral side thereof, and a positioning plate fixedly mounted on said rectangular block.
    Type: Grant
    Filed: April 13, 1998
    Date of Patent: May 16, 2000
    Inventor: Lee Ching Tzeng