Patents by Inventor David E. Cutshall

David E. Cutshall 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).

  • Compensating driver circuit for thermal print head
    Patent number: 4305080
    Abstract: A driver circuit for a thermal printing element varies the power applied to the element, depending upon its recent history of energization, in order to maintain uniform print density desprite temperature variation in the element. A capacitor charges and discharges to measure time intervals since the last element energization to control the voltage applied by an output transistor.
    Type: Grant
    Filed: July 18, 1979
    Date of Patent: December 8, 1981
    Assignee: International Business Machines Corporation
    Inventors: Earl A. Cunningham, David E. Cutshall, Gerald M. Heiling, Ronald L. Soderstrom, James M. Thompson