Patents by Inventor Allen C. Mortensen

Allen C. Mortensen 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).

  • Programmable calculator including means for automatically processing imformation stored on a magnetic record member
    Patent number: 4330839
    Abstract: An adaptable programmable calculator employs modular read-write and read-only memories separately expandable to provide additional program and data storage functions within the calculator oriented toward the environment of the user, an LSI NMOS central processing unit, and LSI NMOS peripheral interface adaptor capable of bidirectionally transferring information between the read-write memory and central processing unit and a number of input/output units. The input/output units include a keyboard input unit with a plurality of alphanumeric keys, a magnetic tape cassette reading and recording unit capable of bidirectionally transferring programs and data between a magnetic tape and the calculator, a seven-segment gas discharge display, and a 16-column alphanumeric thermal printer.
    Type: Grant
    Filed: June 29, 1979
    Date of Patent: May 18, 1982
    Assignee: Hewlett-Packard Company
    Inventors: Bradley W. Miller, Franklin T. Hickenlooper, David C. Uhlrich, Marl D. Godfrey, Douglas M. Clifford, Rex L. James, Robert E. Watson, John C. Keith, Allen C. Mortensen