Granted Patent
Utility
US 5,092,342 · App. 07/533,811
Sensor arrangement for optically measuring gas components
Inventors:
Horst-Dieter Hattendorff, Bernd Grabbet, Eberhart Liesching, Regina Best
Patented Case
View Patent ↗
Granted: Mar 3, 1992
Filed: Jun 6, 1990
Inventors
Horst-Dieter Hattendorff
Bernd Grabbet
Eberhart Liesching
Regina Best
Assignee (at issue)
DRAGERWERK AKTIEGESELLSCHAFT
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.