Granted Patent
Utility
US 4,106,269 · App. 05/755,464
Adjustable ground roller for mower
Inventor:
Henry T. Knudson
Patented Case
View Patent ↗
Granted: Aug 15, 1978
Filed: Dec 30, 1976
Inventor
Henry T. Knudson
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.