Granted Patent
Utility
US 5,208,637 · App. 07/570,777
Liquid toner replenishment system
Inventor:
Benzion Landa
Patented Case
View Patent ↗
Granted: May 4, 1993
Filed: Aug 22, 1990
Inventor
Benzion Landa
Assignee (at issue)
Spectrum Sciences B.V.
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.