Granted Patent
Utility
US 4,943,718 · App. 07/312,632
Mass spectrometer
Inventors:
Raymond Clive Haines, Patrick Turner
Patented Case
View Patent ↗
Granted: Jul 24, 1990
Filed: Feb 17, 1989
Inventors
Raymond Clive Haines
Patrick Turner
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.