Granted Patent
Utility
US 4,239,058 · App. 06/057,911
Pull type relay valve with automatic lockout
Inventor:
Clifford M. Peters
Patented Case
View Patent ↗
Granted: Dec 16, 1980
Filed: Jul 16, 1979
Inventor
Clifford M. Peters
Assignee (at issue)
ACF Industries Incorporated
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.