Granted Patent
Utility
US 6,577,834 · App. 09/768,176
Two-component developing device, image forming apparatus, and stirring screw thereof
Inventor:
Eiji Suzuki
Patented Case
View Patent ↗
Granted: Jun 10, 2003
Filed: Jan 24, 2001
Inventor
Eiji Suzuki
Assignee (at issue)
FUJI XEROX 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.