Granted Patent
Utility
US 4,479,608 · App. 06/512,946
Manure spreader
Inventor:
Mervin G. Martin
Patented Case
View Patent ↗
Granted: Oct 30, 1984
Filed: Jul 13, 1983
Inventor
Mervin G. Martin
Assignee (at issue)
Hedlund Manufacturing Co., Inc.
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.