Granted Patent
Utility
US 6,830,274 · App. 10/350,793
Cover for closing an opening in a wall
Inventors:
Steffen Burkhardt, Dietmar Preissler, Anton Sautner
Patented Case
View Patent ↗
Granted: Dec 14, 2004
Filed: Jan 24, 2003
Inventors
Steffen Burkhardt
Dietmar Preissler
Anton Sautner
Assignee (at issue)
Dynamit Nobel Kunststoff 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.