Granted Patent
Utility
US 6,430,987 · App. 09/698,233
Apparatus and method for measuring the concentration of a paramagnetic gas
Inventor:
Hartmut Stark
Patented Case
View Patent ↗
Granted: Aug 13, 2002
Filed: Oct 30, 2000
Inventor
Hartmut Stark
Assignee (at issue)
Drager Medizintechnik 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.