Granted Patent
Utility
US 5,020,532 · App. 07/270,703
Exhalation valve for respiratory circuit
Inventors:
Michael R. Mahoney, Wayne H. Nieman, Douglas J. McDowell, Virginia Krapil
Patented Case
View Patent ↗
Granted: Jun 4, 1991
Filed: Nov 14, 1988
Inventors
Michael R. Mahoney
Wayne H. Nieman
Douglas J. McDowell
Virginia Krapil
Assignee (at issue)
Baxter International Inc.
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.