Granted Patent
Utility
US 6,227,972 · App. 08/886,584
Method and apparatus for expiration of prepaid slot machine plays
Inventors:
Jay S. Walker, James A. Jorasch, Andrew S. Van Luchene
Patented Case
View Patent ↗
Granted: May 8, 2001
Filed: Jul 1, 1997
Inventors
Jay S. Walker
James A. Jorasch
Andrew S. Van Luchene
Assignee (at issue)
Walker Digital, LLC
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.