Granted Patent
Utility
US 4,644,789 · App. 06/811,423
Liquid level indicator system
Inventor:
Daniel S. Snyder
Patented Case
View Patent ↗
Granted: Feb 24, 1987
Filed: Dec 20, 1985
Inventor
Daniel S. Snyder
Assignee (at issue)
Clevite Industries Inc.
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.