Granted Patent
Utility
US 4,755,670 · App. 06/914,016
Fourtier transform quadrupole mass spectrometer and method
Inventors:
John E. P. Syka, William J. Fies
Patented Case
View Patent ↗
Granted: Jul 5, 1988
Filed: Oct 1, 1986
Inventors
John E. P. Syka
William J. Fies
Assignee (at issue)
Finnigan Corporation
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.