Granted Patent
Utility
US 4,989,606 · App. 07/229,617
Intravascular blood gas sensing system
Inventors:
John L. Gehrich, Thomas P. Maxwell, Thomas G. Hacker
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: Aug 8, 1988
Inventors
John L. Gehrich
Thomas P. Maxwell
Thomas G. Hacker
Assignee (at issue)
Minnesota Mining and Manufacturing 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.