Granted Patent
Utility
US 4,288,692 · App. 06/063,734
Beam current normalization in an X-ray microanalysis instrument
Inventors:
Frederick H. Schamber, Jon J. McCarthy
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: Aug 6, 1979
Inventors
Frederick H. Schamber
Jon J. McCarthy
Assignee (at issue)
Tracor Northern, Inc.
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.