Granted Patent
Utility
US 5,122,841 · App. 07/758,514
Image forming apparatus
Inventor:
Nobukazu Sasaki
Patented Case
View Patent ↗
Granted: Jun 16, 1992
Filed: Sep 6, 1991
Inventor
Nobukazu Sasaki
Assignee (at issue)
CANON KABUSHIKI KAISHA
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.