Granted Patent
Utility
US 4,377,446 · App. 06/368,812
Carbon dioxide measurement
Inventor:
Wyndham J. Albery
Patented Case
View Patent ↗
Granted: Mar 22, 1983
Filed: Apr 15, 1982
Inventor
Wyndham J. Albery
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT CORPORATION
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.