Granted Patent
Utility
US 5,146,276 · App. 07/122,530
Rotatable focusing means and variable magnification electrophotocopier
Inventor:
Benzion Landa
Patented Case
View Patent ↗
Granted: Sep 8, 1992
Filed: Nov 19, 1987
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.