Granted Patent
Utility
US 5,644,131 · App. 08/651,367
Hyperbolic ion trap and associated methods of manufacture
Inventor:
Stuart C. Hansen
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: May 22, 1996
Inventor
Stuart C. Hansen
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.