Granted Patent
Utility
US 4,307,674 · App. 06/172,609
Agricultural implement for planting seeds
Inventors:
Marvin D. Jennings, Keith W. Wendte
Patented Case
View Patent ↗
Granted: Dec 29, 1981
Filed: Jul 28, 1980
Inventors
Marvin D. Jennings
Keith W. Wendte
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.