Granted Patent
Utility
US 4,929,938 · App. 07/156,117
Area searching system
Inventor:
Ryuji Horiguchi
Patented Case
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Granted: May 29, 1990
Filed: Feb 16, 1988
Inventor
Ryuji Horiguchi
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.