Granted Patent
Utility
US 6,131,046 · App. 08/666,048
Altering displayed keys to indicate availability of service for a communications apparatus
Inventors:
Yutaka Sano, Jun Kitakado
Patented Case
View Patent ↗
Granted: Oct 10, 2000
Filed: Jun 19, 1996
Inventors
Yutaka Sano
Jun Kitakado
Assignee (at issue)
SANYO ELECTRIC CO., LTD.
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.