Granted Patent
Utility
US 4,939,943 · App. 07/305,888
Sample injector for a liquid chromatograph
Inventor:
Fred Strohmeier
Patented Case
View Patent ↗
Granted: Jul 10, 1990
Filed: Feb 2, 1989
Inventor
Fred Strohmeier
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.