Granted Patent
Utility
US 5,111,047 · App. 07/587,828
Collisional ionization detected atomic resonance filter
Inventor:
John C. Brock
Patented Case
View Patent ↗
Granted: May 5, 1992
Filed: Sep 21, 1990
Inventor
John C. Brock
Assignee (at issue)
TRW 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.