Granted Patent
Utility
US 3,985,305 · App. 05/575,251
Silage unloader
Inventors:
Gerald E. Williamson, Wayne Dickey, Ross D. Koberlein
Patented Case
View Patent ↗
Granted: Oct 12, 1976
Filed: May 7, 1975
Inventors
Gerald E. Williamson
Wayne Dickey
Ross D. Koberlein
Assignee (at issue)
Koehring Company
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.