Granted Patent
Utility
US 6,320,388 · App. 09/330,522
Multiple channel photo-ionization detector for simultaneous and selective measurement of volatile organic compound
Inventors:
Hong T. Sun, Peter Hsi
Patented Case
View Patent ↗
Granted: Nov 20, 2001
Filed: Jun 11, 1999
Inventors
Hong T. Sun
Peter Hsi
Assignee (at issue)
RAE SYSTEMS, INC.
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.