Granted Patent
Utility
US 6,685,139 · App. 10/319,808
Emergency opening cylinder of a passenger door for an airplane, a door system and a method of modifying a door system
Inventors:
Stefan Blum, Thomas Nickl, Wolfgang Spellmeier
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Dec 16, 2002
Inventors
Stefan Blum
Thomas Nickl
Wolfgang Spellmeier
Assignee (at issue)
Eurocopter Deutschland GmbH
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.