Granted Patent
Utility
US 5,329,576 · App. 07/875,981
Wireless communication zone management system
Inventor:
Martin R. Handforth
Patented Case
View Patent ↗
Granted: Jul 12, 1994
Filed: Apr 29, 1992
Inventor
Martin R. Handforth
Assignee (at issue)
Mitel 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.