Granted Patent
Utility
US 5,537,993 · App. 08/524,609
Gas ratio control device for anestesia apparatus
Inventors:
Dirk-Stefan Reichert, Götz Kullik, Wolfgang Falb, Eckhard Schmudde, Thorsten Haase
Patented Case
View Patent ↗
Granted: Jul 23, 1996
Filed: Sep 7, 1995
Inventors
Dirk-Stefan Reichert
Götz Kullik
Wolfgang Falb
Eckhard Schmudde
Thorsten Haase
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.