Granted Patent
Utility
US 4,343,414 · App. 06/187,373
Seed planter drum drive system
Inventors:
Wayne W. Lark, Marvin D. Jennings, Marvyn J. Madeksho
Patented Case
View Patent ↗
Granted: Aug 10, 1982
Filed: Sep 15, 1980
Inventors
Wayne W. Lark
Marvin D. Jennings
Marvyn J. Madeksho
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.