Patents by Inventor Yoshihara Unami

Yoshihara Unami 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).

  • LED stabilizing light source device
    Patent number: 4998043
    Abstract: An LED stabilizing light source device comprises an LED, a drive circuit for driving the LED, a wavelength filter for filtering the light emitted from the LED, a light splitter for splitting the light passing through the filter, a photodiode for receiving the split light. The device further comprises a feedback loop for feeding an output of the photodiode to the drive circuit.
    Type: Grant
    Filed: May 1, 1989
    Date of Patent: March 5, 1991
    Assignee: Fujikura Ltd.
    Inventors: Yoshihara Unami, Masao Tanaka