Patents by Inventor John S. O'Callaghan, Sr.

John S. O'Callaghan, Sr. 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: 4984008
    Abstract: A writing system is usable in apparatus in which mirrors in a "V" configuration, split mirrors, a combining mirror and a camera mirror project images of opposite sides of a document in an imaging region to a microfilm in side-by-side relation. The writing system includes mirrors which project alpha or numeric character images from an LED display to the combining mirror to be projected to an otherwise unused portion of the microfilm. A compact folded path is provided having the same focal distance as that provided by the document image projecting mirrors.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: January 8, 1991
    Assignee: Bell & Howell Company
    Inventors: Richard Frystak, John S. O'Callaghan, Sr.
  • Patent number: 4960273
    Abstract: A document feeder includes a feed tray which is pivotal about a horizontal axis between an elevated automatic position in which it can be locked and in which the uppermost document of a stack of documents thereon is engaged with an endless belt skimmer to be fed from the stack, and a lowered manual position away from the skimmer for manual feed of a single document. A reverse feed roller is movable with the feed tray and is operative in the automatic position to inhibit feed of documents other than the uppermost document of a stack.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: October 2, 1990
    Assignee: Bell & Howell Company
    Inventors: Richard Frystak, John S. O'Callaghan, Sr., Jean-Jacques Colson