Granted Patent
Utility
US 5,255,183 · App. 07/529,894
Telephone-based personnel tracking system
Inventor:
Penina Katz
Patented Case
View Patent ↗
Granted: Oct 19, 1993
Filed: May 29, 1990
Inventor
Penina Katz
Assignee (at issue)
Interactive Voice Data 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.