Granted Patent
Utility
US 5,773,833 · App. 08/620,635
Photo-ionization detector for volatile gas measurement
Inventor:
Peter Hsi
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Mar 22, 1996
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.