Granted Patent
Utility
US 5,701,570 · App. 08/565,348
Image forming apparatus employing residual toner recovery scheme
Inventor:
Yasuo Takuma
Patented Case
View Patent ↗
Granted: Dec 23, 1997
Filed: Nov 30, 1995
Inventor
Yasuo Takuma
Assignees (at issue)
HITACHI, LTD.
Hitachi Koki 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.