Granted Patent
Utility
US 4,909,247 · App. 07/191,271
Aircraft emergency breathing assembly
Inventors:
Patrick R. Terrisse, James W. Ballinger
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: May 6, 1988
Inventors
Patrick R. Terrisse
James W. Ballinger
Assignee (at issue)
Figgie Inernational 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.