Granted Patent
Utility
US 4,492,271 · App. 06/397,479
Tine tiller with tines and wheels each rotatable in either direction
Inventor:
Charles W. Doering
Patented Case
View Patent ↗
Granted: Jan 8, 1985
Filed: Jul 12, 1982
Inventor
Charles W. Doering
Assignee (at issue)
Brinly-Hardy Company
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.