Patents by Inventor Yoichi Kurihara

Yoichi Kurihara 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).

  • Electronic delay detonator
    Patent number: 4712477
    Abstract: An electronic delay detonator for igniting an ignition resistor a predetermined delay time after supply of electric power from a blasting machine comprises two input terminals for receiving the electric power supplied from the blasting machine, a diode-bridge circuit connected to the input terminals, a power supply capacitor connected to the output of the diode bridge circuit, an RC charging circuit connected in parallel with the capacitor and having a predetermined time constant, and a monolithic IC.
    Type: Grant
    Filed: June 6, 1986
    Date of Patent: December 15, 1987
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Kenichi Aikou, Yoichi Kurihara, Tsugio Goto