Granted Patent
Utility
US 4,084,397 · App. 05/774,813
Arbor assembly for rotary mowers
Inventor:
Laurence R. McGrath
Patented Case
View Patent ↗
Granted: Apr 18, 1978
Filed: Mar 7, 1977
Inventor
Laurence R. McGrath
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.