Douglas Hilgendorf

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Gurnee; all of, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Progressive gaming control and communication system
- Patent number 5,249,800
- Issue date Oct 5, 1993
- Bally Gaming International, Inc.
- Douglas N. Hilgendorf
- G07 - CHECKING-DEVICES
Information Patent Grant
Memory integrity checking system for a gaming device
- Patent number 4,727,544
- Issue date Feb 23, 1988
- Bally Manufacturing Corporation
- Norman Brunner
- G06 - COMPUTING CALCULATING COUNTING