Granted Patent
Utility
US 4,473,008 · App. 06/534,103
Method for intaglio printing and selectively alterable inking plate therefor
Inventor:
Philip M. Heyman
Patented Case
View Patent ↗
Granted: Sep 25, 1984
Filed: Sep 20, 1983
Inventor
Philip M. Heyman
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.