Granted Patent
Utility
US 5,183,115 · App. 07/733,134
Safety valve
Inventor:
John C. Gano
Patented Case
View Patent ↗
Granted: Feb 2, 1993
Filed: Jul 19, 1991
Inventor
John C. Gano
Assignee (at issue)
Otis Engineering 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.