Granted Patent
Utility
US 4,444,480 · App. 06/438,840
Rotating drum-containing sheet or web processing apparatus
Inventor:
Barrie A. Freeman
Patented Case
View Patent ↗
Granted: Apr 24, 1984
Filed: Nov 3, 1982
Inventor
Barrie A. Freeman
Assignee (at issue)
Ciba-Geigy
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.