Granted Patent
Utility
US 5,771,469 · App. 08/843,625
Portable telephone
Inventor:
Hiroyuki Toba
Patented Case
View Patent ↗
Granted: Jun 23, 1998
Filed: Apr 10, 1997
Inventor
Hiroyuki Toba
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.