Granted Patent
Utility
US 6,486,486 · App. 09/375,866
Flame monitoring system
Inventor:
Karl-Friedrich Haupenthal
Patented Case
View Patent ↗
Granted: Nov 26, 2002
Filed: Aug 17, 1999
Inventor
Karl-Friedrich Haupenthal
Assignee (at issue)
SIEMENS BUILDING TECHNOLOGIES AG
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.