Patents by Inventor Suzuo Kojima

Suzuo Kojima 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).

  • Patent number: 3940659
    Abstract: A main capacitor is connected across a series combination of a flash discharge lamp and a thyristor to flash the flash discharge lamp through the thyristor in its ON state. A commutation circuit connected to the thyristor includes a commutation capacitor and another thyristor turned on upon a flashing light from the flash discharge lamp reaching a predetermined magnitude. When turned on, the latter thyristor permits the commutation capacitor to supply a reverse voltage to the first thyristor to turn it off. A semiconductor diode is connected between the commutation capacitor and the first thyristor to prevent that capacitor from applying a forward voltage to the first thyristor.
    Type: Grant
    Filed: January 30, 1974
    Date of Patent: February 24, 1976
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Suzuo Kojima, Yoshio Fujimaru