Patents by Inventor Karl-Gunther Behr

Karl-Gunther Behr 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).

  • Patent number: 5120125
    Abstract: This invention is for an overhead projector to be used with at least one large stage aperture and a small stage aperture above a Fresnel lens, comprising a light source mounted below the plane of the stage, characterized by a single or multi-element condenser which can be positioned between the lamp housing and Fresnel lens. In the case of a small stage aperture, the condenser focuses the light flux designed for the large stage aperture onto the small stage aperture.
    Type: Grant
    Filed: March 22, 1991
    Date of Patent: June 9, 1992
    Assignee: ProCent, Patent- und Verwaltungs AG
    Inventor: Karl-Gunther Behr
  • Patent number: 4952053
    Abstract: The invention concerns a transparency overhead projector having an illumination unit of which the height has been extremely reduced. The main component of the illumination unit is a specular surface comprising mutually parallel, mirrorized prismatic shoulders either on its top or on its lower side, which reflect the light from at least one lateral source toward the Fresnel lens, the platen and the projecting lens. The specular surface may be plane, however it may also be curved in circular, hyperbolic etc. manner in the longitudinal direction of the prismatic shoulders. This curvature may be constant or it may vary. Further, the specular surface also may be twisted, that is, it may also be curved in a direction orthogonal to the prismatic shoulders, and this curvature also may be constant or variable.
    Type: Grant
    Filed: August 22, 1988
    Date of Patent: August 28, 1990
    Assignee: Procent Patent und Verwaltungs AG
    Inventor: Karl-Gunther Behr
  • Patent number: 4170408
    Abstract: A collapsible viewing device for viewing microfilm consists of a carrying case with a bottom part to which is hinged a lid. The case includes a viewing screen, a supply of light, a lever assembly and a spring assembly which, upon opening of the lid, automatically activates the light, moves the screen into its reading position and releasably locks the screen in its viewing position. Closing of the lid against the action of the spring assembly returns the screen into the position in the bottom part of the case against the action of the spring assembly and disconnects the light.
    Type: Grant
    Filed: April 13, 1978
    Date of Patent: October 9, 1979
    Assignee: Minox GmbH
    Inventor: Karl-Gunther Behr