Patents by Inventor Hidehito Ishikawa

Hidehito Ishikawa 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).

  • Dental astral lamp
    Patent number: 4897772
    Abstract: A dental astral lamp using a tungsten halogen lamp as a light source is detachably provided on its light emanating plane with a color temperature transducing filter serving to reduce a luminous intensity at its focal position to a range of 1,500 to 4,500 luxes and transduce a color temperature to a range of 5,000 to 7,500 kelvins.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: January 30, 1990
    Assignee: G-C Dental Industrial Corp.
    Inventors: Masumi Ibusuki, Hidehito Ishikawa