Patents by Inventor Shui Lin Chao

Shui Lin Chao 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).

  • Process and apparatus for sensing magnitude and direction of lateral displacement
    Patent number: 3930734
    Abstract: Process and apparatus therefor for sensing the magnitude and direction of lateral displacement of at least one line or slit element of an article which comprises producing two coherent light beams of the same intensity, one of the beams having a different frequency from that of the other beam, the frequency difference .DELTA.f being within the radio frequency range; converging the two beams to form an interference zone comprising, within the zone of convergence, a fringe pattern characterized by continuous lateral movement at a rate equal to .DELTA.
    Type: Grant
    Filed: April 26, 1974
    Date of Patent: January 6, 1976
    Assignee: Atlantic Research Corporation
    Inventors: Sandor Holly, Shui Lin Chao