Patents by Inventor Kunitoshi Ohashi

Kunitoshi Ohashi 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).

  • Fluorescent detecting apparatus and method
    Patent number: 5608225
    Abstract: A fluorescent light emitted from a marking containing at least one fluorescent substance is detected by illuminating the marking with an exciting light having an intensity that varies at a predetermined cycle, converting a change in intensity of light reflected from a position where the exciting light is irradiated into a varying electric signal and selectively extracting from the converted electric signal, only an electric signal component having a frequency matching with but a phase displaced from, that of a signal component corresponding to light reflected from the marking. A fluorescent detecting apparatus for this purpose includes a light source for irradiating at an irradiating station a marking formed on a medium with rays of light having an intensity that varies cyclically, the marking having at least one fluorescent substance.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: March 4, 1997
    Assignees: Hitachi Maxell, Ltd., Maxell Seiki, Ltd.
    Inventors: Kunio Kamimura, Kunitoshi Ohashi, Toshio Oshima