Granted Patent
Utility
US 4,709,633 · App. 07/037,896
Circuit for controlling the ink level of an intaglio printing device
Inventor:
John W. Woestman
Patented Case
View Patent ↗
Granted: Dec 1, 1987
Filed: Apr 13, 1987
Inventor
John W. Woestman
Assignee (at issue)
RCA 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.