Granted Patent
Utility
US 4,702,240 · App. 06/888,776
Demand-responsive gas blending system for medical ventilator
Inventor:
Samir M. Chaoui
Patented Case
View Patent ↗
Granted: Oct 27, 1987
Filed: Jul 22, 1986
Inventor
Samir M. Chaoui
Assignee (at issue)
Bear Medical Systems, 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.