Granted Patent
Utility
US 4,290,255 · App. 06/192,784
Feed roll apparatus
Inventor:
Wayne B. Martenas
Patented Case
View Patent ↗
Granted: Sep 22, 1981
Filed: Oct 1, 1980
Inventor
Wayne B. Martenas
Assignee (at issue)
Sperry Corp.
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.