Granted Patent
Utility
US 4,569,559 · App. 06/616,524
Height sensing proportioning valve
Inventor:
Keith H. Fulmer
Patented Case
View Patent ↗
Granted: Feb 11, 1986
Filed: Jun 4, 1984
Inventor
Keith H. Fulmer
Assignee (at issue)
ALLIED CONSULTING, 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.