Granted Patent
Utility
US 4,517,890 · App. 06/600,872
Twine wrapping apparatus for a roll baling machine
Inventors:
Willis R. Campbell, James D. Walker
Patented Case
View Patent ↗
Granted: May 21, 1985
Filed: Apr 16, 1984
Inventors
Willis R. Campbell
James D. Walker
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.