Granted Patent
Utility
US 4,464,926 · App. 06/438,716
Method and apparatus for sensing the presence of oxygen in a gas mixture
Inventors:
Scato Albarda, Alfred Eder
Patented Case
View Patent ↗
Granted: Aug 14, 1984
Filed: Nov 3, 1982
Inventors
Scato Albarda
Alfred Eder
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.