Granted Patent
Utility
US 6,144,836 · App. 08/925,763
Electrostatographic printing machine
Inventors:
Takao Umeda, Akio Tsujita, Takashi Rokutanda, Yukio Otome
Patented Case
View Patent ↗
Granted: Nov 7, 2000
Filed: Sep 9, 1997
Inventors
Takao Umeda
Akio Tsujita
Takashi Rokutanda
Yukio Otome
Assignee (at issue)
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.