Granted Patent
Utility
US 6,571,108 · App. 09/321,835
Private branch mobile communication system and method
Inventors:
Kiyokazu Otsuka, Minako Takai
Patented Case
View Patent ↗
Granted: May 27, 2003
Filed: May 28, 1999
Inventors
Kiyokazu Otsuka
Minako Takai
Assignee (at issue)
NEC 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.