Patents by Inventor Jerry H. Pertl

Jerry H. Pertl 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).

  • Method and apparatus for preventing erroneous data transfer from a digital computer
    Patent number: 4128874
    Abstract: This invention relates to an apparatus and method for preventing a digital computer from erroneously outputting data contained in an output word to another digital computer or peripheral device. A portion of the output word is allocated as a key field which must be matched with a predetermined lock value before the digital computer will allow an output of the data field of the output word to occur. That is, a key value specified as part of the output word must match a predetermined lock value before an output transfer of the data field of the output word is allowed to take place. If the lock value and key value do not match, the central processor section of the digital computer is interrupted. This apparatus and method not only verifies the correct operation of the digital computer output data transfer hardware by preventing an erroneous transfer of the data field of the output word but also alerts the central processor section in the event of a mismatch by means of an interrupt.
    Type: Grant
    Filed: October 11, 1977
    Date of Patent: December 5, 1978
    Assignee: Sperry Rand Corporation
    Inventors: Jerry H. Pertl, Howard A. Koehler