Granted Patent
Utility
US 4,727,249 · App. 06/863,356
Magnetic sector mass spectrometer
Inventors:
Robert Harold Bateman, Peter B. Burns
Patented Case
View Patent ↗
Granted: Feb 23, 1988
Filed: May 15, 1986
Inventors
Robert Harold Bateman
Peter B. Burns
Assignee (at issue)
VG Instruments Group Limited
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.