Granted Patent
Utility
US 5,647,355 · App. 08/453,642
Automatic safety valve for respiratory equipment which is counter-balanced and self-adjusting
Inventors:
John R. Starr, Eric W. Starr, William J. Kaigler, John Raymond Pujol, Patrick Devinney, Andrew Serowski
Patented Case
View Patent ↗
Granted: Jul 15, 1997
Filed: May 30, 1995
Inventors
John R. Starr
Eric W. Starr
William J. Kaigler
John Raymond Pujol
Patrick Devinney
Andrew Serowski
Assignee (at issue)
Respironics, 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.