Granted Patent
Utility
US 4,536,652 · App. 06/542,117
Hybrid mass spectrometer
Inventors:
Graham Cooks, Michael S. Story, Gerhard Jung, Peter Dobberstein
Patented Case
View Patent ↗
Granted: Aug 20, 1985
Filed: Oct 14, 1983
Inventors
Graham Cooks
Michael S. Story
Gerhard Jung
Peter Dobberstein
Assignee (at issue)
Finnigan MAT 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.