Patents by Inventor Detlef E. Schmidt

Detlef E. Schmidt 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: 4432619
    Abstract: A microform viewer has a case section pivotally mounting a screen, to move from a collapsed position to a viewing position, and slidably receiving a two-part projection section that telescopes into the case section. As the projection section moves into and out of the case section it positively drives the screen between collapsed and display positions. The projection section is made of two mutually separable housings that fit together along the film path so that when the two housings are separated the two pressure plates forming part of the film path are readily accessible.
    Type: Grant
    Filed: May 3, 1982
    Date of Patent: February 21, 1984
    Assignee: Topper Manufacturing Corporation
    Inventor: Detlef E. Schmidt
  • Patent number: 4358184
    Abstract: A microform viewer has a case section pivotally mounting a screen, to move from a collapsed position to a viewing position, and slidably receiving a two-part projection section that telescopes into the case section. As the projection section moves into and out of the case section it positively drives the screen between collapsed and display positions. The projection section is made of two mutually separable housings that fit together along the film path so that when the two housings are separated the two pressure plates forming part of the film path are readily accessible.
    Type: Grant
    Filed: February 24, 1981
    Date of Patent: November 9, 1982
    Assignee: Topper Manufacturing Corporation
    Inventor: Detlef E. Schmidt
  • Patent number: 4327974
    Abstract: A portable microform viewer provides a short film path through a film transporter that adjustably positions the film in two directions by means of a pair of concentric knobs. A pair of projecting lenses is shiftably mounted for selection of one or the other and the two are mounted on a common pivoted focusing plate. Film is positioned within the film transport by means of a pair of glass flats that are detachably mounted in the transport and flexibly connected to each other for accommodation of microform of different thickness and for ready removal and complete cleaning.
    Type: Grant
    Filed: August 16, 1979
    Date of Patent: May 4, 1982
    Assignee: Topper Manufacturing Corporation
    Inventor: Detlef E. Schmidt