Granted Patent
Utility
US 5,680,164 · App. 08/346,561
Refill method and apparatus for ink cartridge units
Inventors:
Dana D. Miller, John H. Dion, Ruben Oscar Pena Ortiz
Patented Case
View Patent ↗
Granted: Oct 21, 1997
Filed: Nov 29, 1994
Inventors
Dana D. Miller
John H. Dion
Ruben Oscar Pena Ortiz
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.