Granted Patent
Utility
US 4,304,344 · App. 06/107,021
Spreader for particulate material
Inventors:
John Vogel, Carl E. Bochmann
Patented Case
View Patent ↗
Granted: Dec 8, 1981
Filed: Dec 26, 1979
Inventors
John Vogel
Carl E. Bochmann
Assignee (at issue)
O. M. Scotts and Sons 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.