Granted Patent
Utility
US 4,434,607 · App. 06/405,780
Overfill protection apparatus for roll baling machine
Inventor:
Willis R. Campbell
Patented Case
View Patent ↗
Granted: Mar 6, 1984
Filed: Aug 6, 1982
Inventor
Willis R. Campbell
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.