Granted Patent
Utility
US 4,650,415 · App. 06/715,538
Combustion chamber for heating devices
Inventors:
Herbert Langen, Erich Kenner
Patented Case
View Patent ↗
Granted: Mar 17, 1987
Filed: Mar 25, 1985
Inventors
Herbert Langen
Erich Kenner
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.