Granted Patent
Utility
US 4,376,554 · App. 06/228,042
Implement wheel
Inventor:
William Schumacher
Patented Case
View Patent ↗
Granted: Mar 15, 1983
Filed: Jan 26, 1981
Inventor
William Schumacher
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.