Granted Patent
Utility
US 5,594,777 · App. 08/392,751
Wireless private branch exchange system for use with mobile communication devices
Inventors:
Matti Makkonen, Tapani Pokka, Markku Lehto
Patented Case
View Patent ↗
Granted: Jan 14, 1997
Filed: May 17, 1995
Inventors
Matti Makkonen
Tapani Pokka
Markku Lehto
Assignee (at issue)
Telecom Finland Oy
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.