Granted Patent
Utility
US 6,644,183 · App. 10/119,947
Multi-color printing method and system including a plurality of removable ink drums
Inventors:
Hironobu Takasawa, Manabu Wakamatsu
Patented Case
View Patent ↗
Granted: Nov 11, 2003
Filed: Apr 11, 2002
Inventors
Hironobu Takasawa
Manabu Wakamatsu
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.