Granted Patent
Utility
US 4,667,680 · App. 06/551,221
Apparatus and method for reduction in respiration artifact in pulmonary artery pressure measurement
Inventor:
David M. Ellis
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: Nov 14, 1983
Inventor
David M. Ellis
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.