Granted Patent
Utility
US 5,129,794 · App. 07/754,172
Pump apparatus
Inventor:
Christopher Beatty
Patented Case
View Patent ↗
Granted: Jul 14, 1992
Filed: Aug 26, 1991
Inventor
Christopher Beatty
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.