Patents by Inventor Tokio Hibiya

Tokio Hibiya 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).

  • Apparatus for detecting remaining quantity of toner in electrophotographic copying machine
    Patent number: 4313343
    Abstract: An apparatus for detecting the amount of toner in the supply hopper of an electrophotographic copying machine includes a transmitting element in the hopper for generating an ultrasonic acoustic wave and a receiving element in the hopper in operative relation to the transmitting element for receiving the ultrasonic acoustic wave reflected from toner in the hopper, the magnitude of the reflected wave being representative of the level of toner contained in the hopper.
    Type: Grant
    Filed: July 20, 1979
    Date of Patent: February 2, 1982
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Isao Kobayashi, Hideo Akimoto, Yoshiyuki Takahashi, Tokio Hibiya, Masayuki Hata