Patents by Inventor Lawrence A. Hislop

Lawrence A. Hislop 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).

  • Point of sale automatic back-up system and method
    Patent number: 4873631
    Abstract: A point-of-sale system includes a plurality of terminals in which one of the terminals is selected to be a primary terminal and the remaining terminals are selected to be secondary terminals. Program means in the primary terminal will store the data messages received from the secondary terminals and transmit the received data messages to memory means in each of the secondary terminals. Each secondary terminal will determine if it has received all the data messages. If there is found to be a discrepancy in the number of data message received, the secondary terminal will notify the primary terminal of such a discrepancy and the primary terminal will supply the missing data messages.
    Type: Grant
    Filed: April 25, 1988
    Date of Patent: October 10, 1989
    Assignee: NCR Corporation
    Inventors: Robert H. Nathan, Lawrence A. Hislop