Granted Patent
Utility
US 5,454,034 · App. 08/156,546
Arrangement for sharing a telephone office code
Inventor:
Ronald Martin
Patented Case
View Patent ↗
Granted: Sep 26, 1995
Filed: Nov 23, 1993
Inventor
Ronald Martin
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.