Granted Patent
Utility
US 5,691,702 · App. 08/525,190
Pneumatic pressure detector for fire and ground fault detection
Inventor:
Wayne R. Hay
Patented Case
View Patent ↗
Granted: Nov 25, 1997
Filed: Sep 8, 1995
Inventor
Wayne R. Hay
Assignee (at issue)
Whittaker 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.