Granted Patent
Utility
US 5,838,016 · App. 08/905,599
Infrared radiation filament and method of manufacture
Inventor:
Edward A. Johnson
Patented Case
View Patent ↗
Granted: Nov 17, 1998
Filed: Aug 4, 1997
Inventor
Edward A. Johnson
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.