Patents by Inventor Jack L. Mahaffey, II

Jack L. Mahaffey, II 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).

  • Special function control system for a dual microprocessor programmable process control system
    Patent number: 4215399
    Abstract: An intelligent programmable process control system including a first microprocessor which scans and executes a sequence of boolean logic functions and a second microprocessor which performs complex operations including arithmetic computations beyond the capabilities of the first microprocessor. The first microprocessor transmits interrupt requests to the second microprocessor when a scanned sequence instruction requires complex operations to be performed. First flag bit register indicates to the first microprocessor that a requested operation has been queued-up. Second flag bit register indicates to the first microprocessor that the requested operation has been completed.
    Type: Grant
    Filed: August 24, 1978
    Date of Patent: July 29, 1980
    Assignee: Texas Instruments Incorporated
    Inventors: Mark J. Pavicic, Jack L. Mahaffey, II