Granted Patent
Utility
US 4,280,566 · App. 06/030,194
Agricultural disk having non-directional fracture properties
Inventor:
Dale H. Breen
Patented Case
View Patent ↗
Granted: Jul 28, 1981
Filed: Apr 16, 1979
Inventor
Dale H. Breen
Assignee (at issue)
International Harvester 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.