Granted Patent
Utility
US 4,267,448 · App. 06/045,144
Ion detector with bipolar accelerating electrode
Inventors:
Karl Feser, Curt Brunnee
Patented Case
View Patent ↗
Granted: May 12, 1981
Filed: Jun 4, 1979
Inventors
Karl Feser
Curt Brunnee
Assignee (at issue)
Varian 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.