Granted Patent
Utility
US 6,722,281 · App. 10/329,770
Color tone control method for printing press
Inventor:
Shouji Yamamoto
Patented Case
View Patent ↗
Granted: Apr 20, 2004
Filed: Dec 27, 2002
Inventor
Shouji Yamamoto
Assignee (at issue)
MITSUBISHI ELECTRIC CORPORATION
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.