Granted Patent
Utility
US 4,301,715 · App. 06/107,384
4-Way, 2-position pilot valve
Inventor:
Ali Acar
Patented Case
View Patent ↗
Granted: Nov 24, 1981
Filed: Dec 26, 1979
Inventor
Ali Acar
Assignee (at issue)
International Telephone and Telegraph 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.