Patents by Inventor Willis A. Kropp

Willis A. Kropp 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).

  • Microfiche reader employing dual incremental advancing means
    Patent number: 3951532
    Abstract: A microfiche reader includes first and second plates, with a plurality of light sources disposed with the first plate in an array of rows and columns, and a plurality of lens disposed with the second plate in a row-column array, each lens corresponding to one of the light sources. Means are provided for movably positioning a film having information thereon between the plates, and for moving the film with respect to the plates.
    Type: Grant
    Filed: April 11, 1974
    Date of Patent: April 20, 1976
    Assignee: Personal Communications, Inc.
    Inventor: Willis A. Kropp