Patents by Inventor Jong P. Yang

Jong P. Yang 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).

  • Patent number: 4759608
    Abstract: An automatic liquid crystal light-shutter which detects directly the flashing light generated by an alternating current electric welding machine, by means of a photo diode detector and then converts the detected light into an alternating signal current. Then this signal current is filtered to remove miscellaneous signals, amplified and rectified. Next, the rectified signal is fed to an inverter circuit which controls the oscillating of an oscillating circuit that operates a liquid crystal display to function very swiftly.
    Type: Grant
    Filed: December 31, 1985
    Date of Patent: July 26, 1988
    Inventor: Jong P. Yang