Granted Patent
Utility
US 6,530,835 · App. 09/641,903
Free long distance calls on slot machines
Inventors:
Jay S. Walker, James A. Jorasch, Thomas M. Sparico
Patented Case
View Patent ↗
Granted: Mar 11, 2003
Filed: Aug 18, 2000
Inventors
Jay S. Walker
James A. Jorasch
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.