Granted Patent
Utility
US 4,138,830 · App. 05/881,003
Snow thrower with combined discharge vane support and strike-off wall
Inventor:
Alan L. Chase
Patented Case
View Patent ↗
Granted: Feb 13, 1979
Filed: Feb 24, 1978
Inventor
Alan L. Chase
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.