Granted Patent
Utility
US 4,159,613 · App. 05/825,532
Mower attachment with drive subassembly adapted for detachable connection to a tractor
Inventors:
Henry T. Knudson, Kenneth H. Klas
Patented Case
View Patent ↗
Granted: Jul 3, 1979
Filed: Aug 18, 1977
Inventors
Henry T. Knudson
Kenneth H. Klas
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.