Granted Patent
Utility
US 4,289,440 · App. 06/083,117
Mechanism for preventing operation of a bin unloading auger when out of its unloading position
Inventor:
Maynard E. Walberg
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Oct 9, 1979
Inventor
Maynard E. Walberg
Assignee (at issue)
Allis-Chalmers Corporation
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.