Granted Patent
Utility
US 4,536,660 · App. 06/523,031
Flexible means for measuring liquid level
Inventor:
Roland G. Tetro
Patented Case
View Patent ↗
Granted: Aug 20, 1985
Filed: Aug 15, 1983
Inventor
Roland G. Tetro
Assignee (at issue)
Delaval Turbine GmbH
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.