Granted Patent
Utility
US 4,365,200 · App. 06/167,896
Self alarming four double electrodes conductivity cell
Inventor:
Herbert Goldsmith
Patented Case
View Patent ↗
Granted: Dec 21, 1982
Filed: Jul 14, 1980
Inventor
Herbert Goldsmith
Assignee (at issue)
Chemed Corporation
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.