Patents by Inventor Akira Kanzawa

Akira Kanzawa 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).

  • High frequency oscillation type proximity switch
    Patent number: 4583006
    Abstract: A high frequency oscillation type proximity switch, being an approach switch adapted for detecting the approach to or departure from the detector coil of a metal body, based on the change in output of the high frequency oscillator circuit, with the oscillator coil of the oscillator circuit as the detector coil, in which a small-diameter housing case is inserted in the cable interconnecting the detector head and the power source, the printed substrate for use as the signal detector circuit is provided in housing case and the housing case is filled with an insulation resin.
    Type: Grant
    Filed: June 4, 1984
    Date of Patent: April 15, 1986
    Inventors: Toshio Okada, Akira Kanzawa