Granted Patent
Utility
US 5,265,597 · App. 07/907,407
Passenger oxygen mask having a plurality of fingers and recesses for mounting the mask to an oxygen bag
Inventor:
David E. Wallis
Patented Case
View Patent ↗
Granted: Nov 30, 1993
Filed: Jul 1, 1992
Inventor
David E. Wallis
Assignee (at issue)
Puritan-Bennett Corporation
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.