Granted Patent
Utility
US 5,739,535 · App. 08/731,204
Optical gas analyzer
Inventors:
Edmund Koch, Peter Dreyer, Otto Rosinke, Gerd Peter, Wajih Al-Soufi
Patented Case
View Patent ↗
Granted: Apr 14, 1998
Filed: Oct 10, 1996
Inventors
Edmund Koch
Peter Dreyer
Otto Rosinke
Gerd Peter
Wajih Al-Soufi
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.