Granted Patent
Utility
US 6,161,570 · App. 09/323,471
Pilot-operated relief valve
Inventor:
Michael D. McNeely
Patented Case
View Patent ↗
Granted: Dec 19, 2000
Filed: Jun 1, 1999
Inventor
Michael D. McNeely
Assignee (at issue)
Tyco Flow Control Kabushiki Kaisha
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.