Patents by Inventor Douglas N. Hilgendorf

Douglas N. Hilgendorf 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).

  • Progressive gaming control and communication system
    Patent number: 5249800
    Abstract: In order to provide a progressive gaming system with greater speed, flexibility and reliability a communication unit is used to control the information transmitted between a group of gaming machines and a progressive controller. The communication unit collects coin-in information from each of the gaming machines and transmits this information to the progressive controller in response to periodic poll signal signals from the progressive controller.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: October 5, 1993
    Assignee: Bally Gaming International, Inc.
    Inventors: Douglas N. Hilgendorf, Phillip E. Pajak