Patents by Inventor Masumi Osumi

Masumi Osumi 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).

  • Exposure propriety indicating device for flash-photography
    Patent number: 4096498
    Abstract: An exposure propriety indicating device for flash-photography constructed with a circuit comprising a film sensitivity signal generating circuit, an aperture value signal generating circuit, a comparison circuit for comparing signals generated by the two generating circuits, and an indicator circuit for indicating the result of such comparison.
    Type: Grant
    Filed: March 30, 1976
    Date of Patent: June 20, 1978
    Assignee: Nippon Kogaku K.K.
    Inventors: Keno Okuno, Masumi Osumi