Granted Patent
Utility
US 5,548,385 · App. 08/125,317
Developer device that gradually replaces degraded developer with fresh developer
Inventors:
Yasuhiro Takai, Atsushi Ueda, Hirokazu Tanaka, Hideo Yamasa
Patented Case
View Patent ↗
Granted: Aug 20, 1996
Filed: Sep 22, 1993
Inventors
Yasuhiro Takai
Atsushi Ueda
Hirokazu Tanaka
Hideo Yamasa
Assignee (at issue)
SHARP KABUSHIKI KAISHA
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.