Patents by Inventor Takashige Tsukishima

Takashige Tsukishima 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).

  • Dual homodyne detection system to measure asymmetric spectrum by using angle mirrors
    Patent number: 4790656
    Abstract: After being modulated by a coherent local light beam, an asymmetric signal is applied to two homodyne detectors with an adjustable spacing therebetween, and the local coherent light beam is applied to the two homodyne detectors with a phase difference corresponding to said spacing.
    Type: Grant
    Filed: April 23, 1987
    Date of Patent: December 13, 1988
    Assignee: Nogoya University
    Inventor: Takashige Tsukishima