Granted Patent
Utility
US 5,326,447 · App. 07/954,395
Oxygen analyzer
Inventor:
Kenneth S. Fletcher
Patented Case
View Patent ↗
Granted: Jul 5, 1994
Filed: Sep 30, 1992
Inventor
Kenneth S. Fletcher
Assignee (at issue)
Fox Boro Company
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.