Granted Patent
Utility
US 5,155,766 · App. 07/624,148
Push-button pay telephone dispenser
Inventor:
Richard E. Skowronski
Patented Case
View Patent ↗
Granted: Oct 13, 1992
Filed: Nov 28, 1990
Inventor
Richard E. Skowronski
Assignee (at issue)
GTE Airfone Incorporated
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.