Patents by Inventor Takashi Suematu

Takashi Suematu 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).

  • Entoptoscopic instrument for observing the interior of an eye
    Patent number: 5335648
    Abstract: An entoptoscopic instrument (10) comprises a light source unit (20), a light transmitting member (30), and a mirror member (40). The light source unit (20) comprises a filter for cutting off harmful wavelength components from illumination light to restrict the wavelength components of the illumination light to a range between 440 nm and 880 nm.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: August 9, 1994
    Assignee: Hoya Corporation
    Inventors: Tadahiko Kozawa, Yasuhiro Osakabe, Takashi Suematu