Patents by Inventor Taneji Ooka

Taneji Ooka 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).

  • Photoelectric switch
    Patent number: 5030891
    Abstract: A photoelectric switch having a light projector element (L) and a first oscillation circuit (2) for driving the light projector element by use of pulses includes a second oscillation circuit (4) and a coupling circuit (3) for coupling the second oscillation circuit with the first oscillation circuit. The second oscillation circuit sweeps an oscillation frequency of the first oscillation circuit at a predetermined period to vary the oscillation frequency of the first oscillation circuit in a periodical manner.
    Type: Grant
    Filed: November 27, 1989
    Date of Patent: July 9, 1991
    Assignee: Omron Tateisi Electronic Co.
    Inventor: Taneji Ooka