Granted Patent
Utility
US 6,766,616 · App. 10/648,374
Opening flap, in particular flue gas escape flap, and opening mechanism therefor
Inventor:
Stefan Richter
Patented Case
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Granted: Jul 27, 2004
Filed: Aug 27, 2003
Inventor
Stefan Richter
Assignee (at issue)
SUSPA 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.