Granted Patent
Utility
US 6,439,739 · App. 09/670,130
Incandescent lamp
Inventor:
Ingolf Sischka
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: Sep 26, 2000
Inventor
Ingolf Sischka
Assignee (at issue)
KONINKLIJKE PHILIPS ELECTRONICS NV
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.