Granted Patent
Utility
US 4,493,274 · App. 06/153,974
Furrow forming apparatus for a seed planter
Inventors:
Edward L. Robinson, Jr., Tom G. Stamp
Patented Case
View Patent ↗
Granted: Jan 15, 1985
Filed: May 28, 1980
Inventors
Edward L. Robinson, Jr.
Tom G. Stamp
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.