Granted Patent
Utility
US 6,487,384 · App. 09/826,943
Image forming electrophotography apparatus and magnetic developing unit
Inventors:
Hisao Okada, Hiroyuki Mabuchi, Teruaki Mitsuya, Shinya Kobayashi, Yasuo Takuma, Masayoshi Ishii, Hisayoshi Kato
Patented Case
View Patent ↗
Granted: Nov 26, 2002
Filed: Apr 6, 2001
Inventors
Hisao Okada
Hiroyuki Mabuchi
Teruaki Mitsuya
Shinya Kobayashi
Yasuo Takuma
Masayoshi Ishii
Hisayoshi Kato
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.