Granted Patent
Utility
US 4,459,982 · App. 06/417,621
Servo-controlled demand regulator for respiratory ventilator
Inventor:
Stanley E. Fry
Patented Case
View Patent ↗
Granted: Jul 17, 1984
Filed: Sep 13, 1982
Inventor
Stanley E. Fry
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.