Granted Patent
Utility
US 6,308,008 · App. 09/462,114
IR-source with helically shaped heating element
Inventors:
Lars-Goran Johansson, Jan-Erik Andersson
Patented Case
View Patent ↗
Granted: Oct 23, 2001
Filed: Dec 30, 1999
Inventors
Lars-Goran Johansson
Jan-Erik Andersson
Assignee (at issue)
KANTHAL AB
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.