Granted Patent
Utility
US 4,138,829 · App. 05/880,990
Discharge vane arrangement for a powered snow thrower
Inventor:
Alan L. Chase
Patented Case
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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.