Granted Patent
Utility
US 4,848,151 · App. 06/854,252
Liquid level detector
Inventors:
John R. Bruder, Gerald M. Sivulka, Leonard T. Tribe
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Apr 21, 1986
Inventors
John R. Bruder
Gerald M. Sivulka
Leonard T. Tribe
Assignee (at issue)
KELSEY-HAYES-COMPANY
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.