Granted Patent
Utility
US 5,594,535 · App. 08/553,218
Refillable toner cartridge
Inventors:
Richard F. Beaufort, Robin P. Yergenson, Howard Hooper
Patented Case
View Patent ↗
Granted: Jan 14, 1997
Filed: Nov 7, 1995
Inventors
Richard F. Beaufort
Robin P. Yergenson
Howard Hooper
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.