Granted Patent
Utility
US 5,667,213 · App. 08/402,605
Small-size-sheet stacking unit and cleaning sheet therefor
Inventors:
Hiroaki Chida, Mitsuo Sato, Shigenobu Irokawa
Patented Case
View Patent ↗
Granted: Sep 16, 1997
Filed: Mar 13, 1995
Inventors
Hiroaki Chida
Mitsuo Sato
Shigenobu Irokawa
Assignee (at issue)
Tohoku Ricoh 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.