Granted Patent
Utility
US 5,654,543 · App. 08/552,041
Mass spectrometer and related method
Inventor:
Gangqiang Li
Patented Case
View Patent ↗
Granted: Aug 5, 1997
Filed: Nov 2, 1995
Inventor
Gangqiang Li
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.