Granted Patent
Utility
US 4,286,670 · App. 05/967,411
Combination tiller and cultivator and drive control therefor
Inventor:
Donald W. Ackerman
Patented Case
View Patent ↗
Granted: Sep 1, 1981
Filed: Dec 7, 1978
Inventor
Donald W. Ackerman
Assignee (at issue)
Garden Way Incorporated
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.