Granted Patent
Utility
US 5,277,576 · App. 07/876,233
Gas burner
Inventors:
Karl-Heinz Hartung, Heinz Somer
Patented Case
View Patent ↗
Granted: Jan 11, 1994
Filed: Apr 30, 1992
Inventors
Karl-Heinz Hartung
Heinz Somer
Assignee (at issue)
Paul Isphording Metallwerke 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.