Patents by Inventor James J. Donohue

James J. Donohue 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).

  • Distributed microprocessor control system for a copier/duplicator
    Patent number: 4190350
    Abstract: An electrophotographic reproduction machine for use as a copier/duplicator having a master microprogrammed controller and a plurality of area controllers cooperatively operative to carry out a plurality of machine operation tasks. At least one of the area controllers contains a separate microprogrammed controller for controlling selected tasks and devices in the reproduction machine in synchronism with the operation of other tasks as controlled by the master controller. An optical communication link couples the master and area controllers and serves to isolate the master controller from transients and a direct I/O connection.
    Type: Grant
    Filed: August 30, 1977
    Date of Patent: February 26, 1980
    Inventors: James J. Donohue, Kenneth Gillett, Charles P. Holt, Andrew T. Ling, Richard M. Malinich, Frank M. Nelson