Granted Patent
Utility
US 6,234,897 · App. 09/382,922
Gaming device with variable bonus payout feature
Inventors:
Erica A. Frohm, Lawrence E. DeMar, Robert J. Wilson, Jr., Alfred Thomas
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: Aug 25, 1999
Inventors
Erica A. Frohm
Lawrence E. DeMar
Robert J. Wilson, Jr.
Alfred Thomas
Assignee (at issue)
WMS GAMING, INC.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.