Granted Patent
Utility
US 6,733,387 · App. 10/162,823
Conditional lottery system
Inventors:
Jay S. Walker, Thomas M. Sparico
Patented Case
View Patent ↗
Granted: May 11, 2004
Filed: Oct 25, 2001
Inventors
Jay S. Walker
Thomas M. Sparico
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.