Granted Patent
Utility
US 6,644,797 · App. 10/051,892
Filter for an ink jet pen
Inventors:
Paul Mark Haines, James W. Ring, Gary Tarver
Patented Case
View Patent ↗
Granted: Nov 11, 2003
Filed: Jan 18, 2002
Inventors
Paul Mark Haines
James W. Ring
Gary Tarver
Assignee (at issue)
Hewlett-Packard Development 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.