Granted Patent
Utility
US 4,699,500 · App. 06/931,472
Electrographic copier with three development stations
Inventors:
Cor Lubberts, Gregory N. Stafford
Patented Case
View Patent ↗
Granted: Oct 13, 1987
Filed: Nov 17, 1986
Inventors
Cor Lubberts
Gregory N. Stafford
Assignee (at issue)
EASTMAN KODAK COMPANY
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.