Granted Patent
Utility
US 5,127,437 · App. 07/641,436
Valve
Inventor:
Paul F. Ross, II
Patented Case
View Patent ↗
Granted: Jul 7, 1992
Filed: Jan 15, 1991
Inventor
Paul F. Ross, II
Assignee (at issue)
Control Devices, LLC
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.