Granted Patent
Utility
US 5,650,624 · App. 08/422,507
Passive infrared analysis gas sensor
Inventor:
Jacob Y. Wong
Patented Case
View Patent ↗
Granted: Jul 22, 1997
Filed: Apr 13, 1995
Inventor
Jacob Y. Wong
Assignee (at issue)
Engelhard Sensor Technologies, 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.