Granted Patent
Utility
US 5,871,033 · App. 08/875,981
Suction pipe for the combustion air of a heater
Inventors:
Helmut Keinert, Adolf Schodt
Patented Case
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Granted: Feb 16, 1999
Filed: Aug 19, 1997
Inventors
Helmut Keinert
Adolf Schodt
Assignee (at issue)
J. Eberspaecher GmbH & Co. KG
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.