Patents by Inventor Osayoshi Imamura

Osayoshi Imamura 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).

  • Abnormality sensing device for gas-insulated electric apparatus
    Patent number: 4291989
    Abstract: An abnormality sensing device for use with gas-insulated equipment senses a faulted section by comparing a change in the quantity of light between a light emitting element and a light receiving element.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: September 29, 1981
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yoshiaki Ida, Shiro Fukuda, Osayoshi Imamura