Granted Patent
Utility
US 4,881,824 · App. 07/289,040
Immersible probe
Inventors:
Richard A. Falk, James Colzani
Patented Case
View Patent ↗
Granted: Nov 21, 1989
Filed: Dec 23, 1988
Inventors
Richard A. Falk
James Colzani
Assignee (at issue)
MIDWEST INSTRUMENT 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.