Granted Patent
Utility
US 4,995,421 · App. 07/462,591
Lock-out valve with controlled restart
Inventors:
Dennis L. Bonacorsi, Donald E. McGeachy, Alan Smith
Patented Case
View Patent ↗
Granted: Feb 26, 1991
Filed: Jan 9, 1990
Inventors
Dennis L. Bonacorsi
Donald E. McGeachy
Alan Smith
Assignee (at issue)
Numatics, 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.