Patents by Inventor Dwight W. Lindsey

Dwight W. Lindsey 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).

  • Focusing system for a transparency projector
    Patent number: 4744652
    Abstract: A focusing system for slide projectors and the like in which the lens is mounted in a replaceable shift ring which can be selected from a set of such rings with different offsets between the lens axis and the projector axis. The ring can be assembly-affixed on a plate which can be clamped against the projector housing over the projection lens aperture thereof.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: May 17, 1988
    Assignee: Schneider Corporation of America
    Inventor: Dwight W. Lindsey