Granted Patent
Utility
US 5,561,344 · App. 08/399,493
Photo-ionization detector for detecting volatile organic gases
Inventor:
Peter Hsi
Patented Case
View Patent ↗
Granted: Oct 1, 1996
Filed: Mar 7, 1995
Inventor
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.