Granted Patent
Utility
US 4,635,439 · App. 06/722,236
Fluid operated system control
Inventor:
John E. Wible
Patented Case
View Patent ↗
Granted: Jan 13, 1987
Filed: Apr 11, 1985
Inventor
John E. Wible
Assignee (at issue)
Caterpillar Industrial 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.