Patents by Inventor Chang Hwi Chi

Chang Hwi Chi 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).

  • Laser cavity structure
    Patent number: 4151487
    Abstract: A laser cavity structure in which the laser gain medium is located outside the resonant cavity and optically connected to the cavity through a hole in one of the cavity mirror by means of an optical arrangement located external of the resonant cavity.
    Type: Grant
    Filed: September 12, 1977
    Date of Patent: April 24, 1979
    Inventor: Chang Hwi Chi