Patents by Inventor William M. Kahlbaum, Jr.

William M. Kahlbaum, Jr. 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).

  • Chromatically corrected virtual image visual display
    Patent number: 4206970
    Abstract: An in-line, three element, large diameter, optical display lens having a front convex-convex element, a central convex-concave element, and a rear convex-convex element. The lens, used in flight simulators, magnifies an image presented on a televison monitor and, by causing light rays leaving the lens to be in essentially parallel paths, reduces eye strain of the simulator operator.
    Type: Grant
    Filed: October 23, 1978
    Date of Patent: June 10, 1980
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventor: William M. Kahlbaum, Jr.