Granted Patent
Utility
US 4,447,728 · App. 06/346,288
Ionizer including discharge ion source and method
Inventors:
George C. Stafford, Donald C. Bradford
Patented Case
View Patent ↗
Granted: May 8, 1984
Filed: Feb 5, 1982
Inventors
George C. Stafford
Donald C. Bradford
Assignee (at issue)
Finnigan Corporation
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.