Granted Patent
Utility
US 4,991,504 · App. 07/436,628
Ink duct for a printing machine
Inventor:
Raffaele Fina
Patented Case
View Patent ↗
Granted: Feb 12, 1991
Filed: Nov 15, 1989
Inventor
Raffaele Fina
Assignee (at issue)
De La Rue Giori S.A.
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.