Granted Patent
Utility
US 5,036,365 · App. 07/273,831
Field assisted filter and electrophotographic copying machine using the same
Inventor:
Benzion Landa
Patented Case
View Patent ↗
Granted: Jul 30, 1991
Filed: Nov 21, 1988
Inventor
Benzion Landa
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.