Patents Assigned to Information Design Corporation of America
  • Circular photographic slide tray
    Patent number: 4026645
    Abstract: A circular tray for photographic slide projectors wherein the tray is provided with slide holders that are capable of being repositioned, together with the slide thereof, in any position circumferentially of the tray.
    Type: Grant
    Filed: March 8, 1976
    Date of Patent: May 31, 1977
    Assignee: Information Design Corporation of America
    Inventors: Eric B. Bown, Harold P. Mueller, III, Elton Robertson