Granted Patent
Utility
US 4,840,074 · App. 07/175,847
Multi-stream fluid sampling valve
Inventor:
Paul A. Jessop
Patented Case
View Patent ↗
Granted: Jun 20, 1989
Filed: Mar 31, 1988
Inventor
Paul A. Jessop
Assignee (at issue)
VG Instruments Group Limited
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.