Patents by Inventor Syuji Katsuma

Syuji Katsuma 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).

  • Binocular telescope with auxiliary lens system
    Patent number: 5000556
    Abstract: Auxiliary lens cylinders constituting a tele-or wide-conversion lens system can be held in and away from the front of the objective lenses of a binocular telescope, so that the main lens system of the binocular telescope can be converted to a highly magnifying tele-conversion or wide-conversion system without influencing the position of image obtained with the main lens system.
    Type: Grant
    Filed: June 28, 1989
    Date of Patent: March 19, 1991
    Assignee: Katsuma Kougakukikai Kabushikikaisha
    Inventor: Syuji Katsuma