Granted Patent
Utility
US 6,203,429 · App. 09/140,947
Gaming machine with bonus mode
Inventors:
Lawrence E. DeMar, Erica Frohm, William Grupp, Scott Slomiany
Patented Case
View Patent ↗
Granted: Mar 20, 2001
Filed: Aug 27, 1998
Inventors
Lawrence E. DeMar
Erica Frohm
William Grupp
Scott Slomiany
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.