Granted Patent
Utility
US 5,880,748 · App. 08/705,394
Ink delivery system for an inkjet pen having an automatic pressure regulation system
Inventors:
Winthrop D. Childers, Brian J. Keefe, John Paul Harmon
Patented Case
View Patent ↗
Granted: Mar 9, 1999
Filed: Aug 30, 1996
Inventors
Winthrop D. Childers
Brian J. Keefe
John Paul Harmon
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.