Granted Patent
Utility
US 4,959,667 · App. 07/311,505
Refillable ink bag
Inventor:
George T. Kaplinsky
Patented Case
View Patent ↗
Granted: Sep 25, 1990
Filed: Feb 14, 1989
Inventor
George T. Kaplinsky
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.