Granted Patent
Utility
US 4,410,218 · App. 06/273,870
Control valve for tractor rear axles
Inventor:
Richard C. Bueler
Patented Case
View Patent ↗
Granted: Oct 18, 1983
Filed: Jun 15, 1981
Inventor
Richard C. Bueler
Assignee (at issue)
Echlin, Inc.
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.