Granted Patent
Utility
US 5,225,063 · App. 07/727,981
Apparatus for the electrochemical determination of the partial oxygen pressure in a liquid measuring medium
Inventors:
Walter Gumbrecht, Wolfgang Schelter, Roland Hofmann-Tikkanen, Walter Preidel
Patented Case
View Patent ↗
Granted: Jul 6, 1993
Filed: Jul 10, 1991
Inventors
Walter Gumbrecht
Wolfgang Schelter
Roland Hofmann-Tikkanen
Walter Preidel
Assignee (at issue)
Siemens Aktiengesellschaft
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.