Patents by Inventor Ruth Opperman

Ruth Opperman 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).

  • Microfilm reader
    Patent number: 4077708
    Abstract: A holding frame holds a microfiche. Guide rails mount the holding frame on the microfilm reader housing for movement along two perpendicular coordinate axes for moving selected portions of the microfiche held by the frame into position to be projected. An arresting device arrests the frame in selected positions and includes a stationary clamped structure on the housing and a cooperating releasable clamping structure on the frame. The clamping structure when not released clamps the clamped structure and thereby arrests the frame relative to the housing.
    Type: Grant
    Filed: September 16, 1976
    Date of Patent: March 7, 1978
    Assignee: AGFA-Gevaert, A.G.
    Inventors: Gunter Freiberg, Adolf Koopmann, Gunther Luder, Ruth Opperman, Wilfried Hofmann