Granted Patent
Utility
US 6,131,000 · App. 09/208,447
Electrophotographic printing apparatus using electric potential dividing development
Inventors:
Shinichi Akatsu, Teruaki Mitsuya, Kenichi Ito, Nobuyoshi Hoshi, Ryuuichi Shimizu, Hisao Okada, Hiroyuki Mabuchi, Masayoshi Ishii, Seiji Maruo
Patented Case
View Patent ↗
Granted: Oct 10, 2000
Filed: Dec 10, 1998
Inventors
Shinichi Akatsu
Teruaki Mitsuya
Kenichi Ito
Nobuyoshi Hoshi
Ryuuichi Shimizu
Hisao Okada
Hiroyuki Mabuchi
Masayoshi Ishii
Seiji Maruo
Assignees (at issue)
HITACHI, LTD.
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.