Granted Patent
Utility
US 5,598,523 · App. 08/608,217
Method and system for displayed menu activation using a matching distinctive arrangement of keypad actuators
Inventor:
Yosuke Fujita
Patented Case
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Granted: Jan 28, 1997
Filed: Feb 28, 1996
Inventor
Yosuke Fujita
Assignee (at issue)
Panasonic Technologies, Inc.
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.