Granted Patent
Utility
US 4,868,859 · App. 07/062,174
Supervised, interactive alarm reporting system
Inventor:
Eliezer A. Sheffer
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: Jun 12, 1987
Inventor
Eliezer A. Sheffer
Assignee (at issue)
BT Telecom, 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.