Granted Patent
Utility
US 5,069,439 · App. 07/575,483
Image forming apparatus with improved operation panel operability
Inventor:
Satoshi Ise
Patented Case
View Patent ↗
Granted: Dec 3, 1991
Filed: Aug 30, 1990
Inventor
Satoshi Ise
Assignee (at issue)
CASIO COMPUTER 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.