Granted Patent
Utility
US 5,381,953 · App. 08/209,860
Fail-open locking element and thermostat incorporating same
Inventor:
Joseph Fishman
Patented Case
View Patent ↗
Granted: Jan 17, 1995
Filed: Mar 14, 1994
Inventor
Joseph Fishman
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.