Granted Patent
Utility
US 4,773,755 · App. 06/900,667
Method and apparatus for determining the zero line in atomic absorption spectrometers
Inventor:
Bernhard Huber
Patented Case
View Patent ↗
Granted: Sep 27, 1988
Filed: Aug 27, 1986
Inventor
Bernhard Huber
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.