Granted Patent
Utility
US 5,818,063 · App. 08/821,034
Optical sensor for contamination in a circulating cleaning fluid
Inventors:
Johann Wilhelmstatter, Helmut Jerg, Bernd Schessl, Gerhard Fetzer, Michael Hartmann, Markus Höpfl, Karl-Heinz Rehm, Rudolf Schmidt
Patented Case
View Patent ↗
Granted: Oct 6, 1998
Filed: Mar 20, 1997
Inventors
Johann Wilhelmstatter
Helmut Jerg
Bernd Schessl
Gerhard Fetzer
Michael Hartmann
Markus Höpfl
Karl-Heinz Rehm
Rudolf Schmidt
Assignee (at issue)
BSH Bosch und Siemens Hausgeräte GmbH
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.