Patents by Inventor David R. Duerr

David R. Duerr 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).

  • Apparatus to place microfilm frames in jackets
    Patent number: 4616473
    Abstract: An inserter for inserting microfilm frames, originally on film strips, into jacket channels, singly or in series. Grip means grips the end of a strip of film and moves a selected frame to a projection station. There the frame is severed, and a pusher inserts it into a jacket channel. The strip and the pusher mutually exclude one another from a channel through which the frames moves toward the jacket.
    Type: Grant
    Filed: August 16, 1985
    Date of Patent: October 14, 1986
    Assignee: Data Conversion Inc.
    Inventors: Paul L. Hodges, David R. Duerr