Patents by Inventor Hiroyuki Kato, deceased

Hiroyuki Kato, deceased 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).

  • Afocal zooming optical system
    Patent number: 5504624
    Abstract: An afocal zooming optical system comprising a plurality of lens groups or components, in which the lens groups movable along the optical axis for zooming do not include the lens group closest to the eye, with the lens group positioned closest to the eye being movable for dioptry adjustment.
    Type: Grant
    Filed: November 29, 1991
    Date of Patent: April 2, 1996
    Assignee: Asashi Kogaku Kogyo Kabushiki Kaisha
    Inventor: Hiroyuki Kato, deceased