Patents by Inventor Yaw-Shen Lie

Yaw-Shen Lie 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).

  • Electronic multi-shaft absolute position detecting device
    Patent number: 5287285
    Abstract: An electronic multi-shaft absolute position detecting device comprising an absolute position recording circuit, an interface circuit, a spare power circuit, and a cooperating application software circuit is used to detect the increment position signal produced by the measuring system of the numerical control machine tone and convert the signal into absolute position signal and record the machine position value. In case power is cut off, the spare power circuit can provide the absolute position recording circuit and interface circuit with power so that the absolute position recording circuit can continuously detect the position signals produced by the measuring system and record the machine position value thereof.
    Type: Grant
    Filed: May 24, 1991
    Date of Patent: February 15, 1994
    Assignee: Industrial Technology Research Institute
    Inventors: You-Kung Tsai, Yuh-Jinn Wang, Yaw-Shen Lie, Yie-Wen Chen