Granted Patent
Utility
US 4,708,163 · App. 07/007,749
Safety valve
Inventor:
Thomas M. Deaton
Patented Case
View Patent ↗
Granted: Nov 24, 1987
Filed: Jan 28, 1987
Inventor
Thomas M. Deaton
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.