Granted Patent
Utility
US 4,638,973 · App. 06/798,100
Inline solenoid operated slide valve
Inventor:
Robert J. Torrence
Patented Case
View Patent ↗
Granted: Jan 27, 1987
Filed: Nov 14, 1985
Inventor
Robert J. Torrence
Assignee (at issue)
Eaton Corporation
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.