Granted Patent
Utility
US 6,308,159 · App. 09/209,461
Method and apparatus for ticket turn-back capability
Inventor:
Glenn E. Strohl
Patented Case
View Patent ↗
Granted: Oct 23, 2001
Filed: Dec 11, 1998
Inventor
Glenn E. Strohl
Assignee (at issue)
AT&T CORP.
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.