Granted Patent
Utility
US 4,600,812 · App. 06/674,234
Communication system having abbreviated dialing access
Inventor:
Robert R. Gerlits
Patented Case
View Patent ↗
Granted: Jul 15, 1986
Filed: Nov 23, 1984
Inventor
Robert R. Gerlits
Assignee (at issue)
AT&T Information Systems Inc.
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.