Granted Patent
Utility
US 5,646,839 · App. 08/306,301
Telephone-based personnel tracking system
Inventor:
Penina Katz
Patented Case
View Patent ↗
Granted: Jul 8, 1997
Filed: Sep 14, 1994
Inventor
Penina Katz
Assignee (at issue)
MCIC Communications Corporation
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.