Patents by Inventor Takahisa Iwamoto

Takahisa Iwamoto 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).

  • Coin diameter discriminating apparatus
    Patent number: 5452785
    Abstract: The present invention relates to a coin discriminating apparatus for discriminating the thickness, material, diameter, and the like of a coin at high precision. A transmission coil (11) receives an AC signal generated by an AC signal generating unit (24) and applies an alternating magnetic field to a coin (C) to be discriminated. A reception coil (12) detects an electromotive force induced when the the transmission coil (11) applies the alternating magnetic field on the coin to be discriminated. A detection signal generating unit (27) generates a detection signal having a predetermined phase with respect to the AC signal generated by the AC signal generating unit (24). A phase detecting unit (26) phase-detects the electromotive force detected by the reception coil (12) in accordance with the detection signal generated by the detection signal generating unit.
    Type: Grant
    Filed: September 26, 1994
    Date of Patent: September 26, 1995
    Assignee: Anritsu Corporation
    Inventors: Takahisa Iwamoto, Ken Shioiri, Yoshifumi Takahashi, Noriyuki Kodama, Shintaro Inagaki, Masaru Honma