Granted Patent
Utility
US 4,590,575 · App. 06/537,641
Dielectric compensated level control system for use in tanks containing substance
Inventor:
Raymond H. Emplit
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: Sep 30, 1983
Inventor
Raymond H. Emplit
Assignee (at issue)
ROBERTSHAW CONTROLS PRIVATE 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.