Granted Patent
Utility
US 6,533,404 · App. 08/705,507
Ink supply for preventing the passage of air
Inventor:
David Olsen
Patented Case
View Patent ↗
Granted: Mar 18, 2003
Filed: Aug 28, 1996
Inventor
David Olsen
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.