Granted Patent
Utility
US 4,912,324 · App. 07/314,555
Glow discharge spectrometer
Inventors:
Jeremy D. H. Clark, Robert C. Hoodless
Patented Case
View Patent ↗
Granted: Mar 27, 1990
Filed: Feb 23, 1989
Inventors
Jeremy D. H. Clark
Robert C. Hoodless
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.