Granted Patent
Utility
US 6,229,879 · App. 09/044,883
Method and apparatus for awarding and redeeming prepaid telephone time
Inventors:
Jay S. Walker, James A. Jorasch
Patented Case
View Patent ↗
Granted: May 8, 2001
Filed: Mar 20, 1998
Inventors
Jay S. Walker
James A. Jorasch
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.