Granted Patent
Utility
US 5,657,370 · App. 08/434,687
Cellular portable radiotelephone
Inventors:
Yoshiyuki Tsugane, Michio Nagai
Patented Case
View Patent ↗
Granted: Aug 12, 1997
Filed: May 4, 1995
Inventors
Yoshiyuki Tsugane
Michio Nagai
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.