Granted Patent
Utility
US 4,474,327 · App. 06/461,867
Fertilizer spreader
Inventors:
Charles A. Mattson, James J. Michel, Anthony Domagalski
Patented Case
View Patent ↗
Granted: Oct 2, 1984
Filed: Jan 28, 1983
Inventors
Charles A. Mattson
James J. Michel
Anthony Domagalski
Assignee (at issue)
Allegretti & 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.