Granted Patent
Utility
US 4,953,977 · App. 07/285,884
Electrothermal atomization furnace
Inventor:
Rolf Tamm
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Dec 16, 1988
Inventor
Rolf Tamm
Assignee (at issue)
Bodenseewerk Perkin-Elmer GmbH
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.