Granted Patent
Utility
US 5,578,994 · App. 08/248,911
Liquid level switch
Inventors:
Bogdan Cherek, John E. Gillis
Patented Case
View Patent ↗
Granted: Nov 26, 1996
Filed: May 25, 1994
Inventors
Bogdan Cherek
John E. Gillis
Assignee (at issue)
Milltronics Ltd.
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.