Granted Patent
Utility
US 6,144,829 · App. 09/297,520
Developing device and electrophotographic device
Inventors:
Toru Miyasaka, Kazushige Oonishi, Masahiko Saito, Tadashi Okano, Shoji Takeya
Patented Case
View Patent ↗
Granted: Nov 7, 2000
Filed: May 3, 1999
Inventors
Toru Miyasaka
Kazushige Oonishi
Masahiko Saito
Tadashi Okano
Shoji Takeya
Assignee (at issue)
HITACHI, 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.