Granted Patent
Utility
US 4,417,436 · App. 06/361,687
Method of adjusting apron tension in roll baling machines
Inventor:
Willis R. Campbell
Patented Case
View Patent ↗
Granted: Nov 29, 1983
Filed: Mar 25, 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.