Granted Patent
Utility
US 4,825,168 · App. 06/869,087
Remote conductivity sensor using square wave excitation
Inventors:
Francis T. Ogawa, George J. Eilers, Michael R. Manes, Donn D. Lobdell, Terry D. Boucher
Patented Case
View Patent ↗
Granted: Apr 25, 1989
Filed: May 30, 1986
Inventors
Francis T. Ogawa
George J. Eilers
Michael R. Manes
Donn D. Lobdell
Terry D. Boucher
Assignee (at issue)
Cobe Laboratories, 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.