Granted Patent
Utility
US 4,721,662 · App. 06/923,396
Electrophotographic image forming method to produce multicolor images
Inventor:
Satoshi Haneda
Patented Case
View Patent ↗
Granted: Jan 26, 1988
Filed: Oct 23, 1986
Inventor
Satoshi Haneda
Assignee (at issue)
Konishiroku Photo Industry Co., Ltd.
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.