Granted Patent
Utility
US 5,517,217 · App. 07/968,705
Apparatus for enhancing ink-flow reliability in a thermal-inkjet pen; method for priming and using such a pen
Inventors:
Robert D. Haselby, Irene H. Williams, Gerold Firl
Patented Case
View Patent ↗
Granted: May 14, 1996
Filed: Oct 30, 1992
Inventors
Robert D. Haselby
Irene H. Williams
Gerold Firl
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.