Granted Patent
Utility
US 6,009,293 · App. 08/992,995
Optical communication device communicating information between revolving type developing device and image forming apparatus
Inventor:
Nobuo Takami
Patented Case
View Patent ↗
Granted: Dec 28, 1999
Filed: Dec 18, 1997
Inventor
Nobuo Takami
Assignee (at issue)
RICOH COMPANY, 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.