Granted Patent
Utility
US 5,394,867 · App. 08/101,233
Personal disposable emergency breathing system with dual air supply
Inventor:
Linsey J. Swann
Patented Case
View Patent ↗
Granted: Mar 7, 1995
Filed: Aug 2, 1993
Inventor
Linsey J. Swann
Assignee (at issue)
Brookdale International 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.