Granted Patent
Utility
US 3,975,582 · App. 05/520,851
Fluid level sensing probe
Inventor:
David Julian Ford
Patented Case
View Patent ↗
Granted: Aug 17, 1976
Filed: Nov 4, 1974
Inventor
David Julian Ford
Assignee (at issue)
TRW Limited
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.