Granted Patent
Utility
US 4,450,220 · App. 06/349,999
Method of charging electrostatic developer
Inventors:
Satoshi Haneda, Takashi Itoh, Ken Nakamura, Makoto Tomono
Patented Case
View Patent ↗
Granted: May 22, 1984
Filed: Feb 18, 1982
Inventors
Satoshi Haneda
Takashi Itoh
Ken Nakamura
Makoto Tomono
Assignee (at issue)
Konishiroku Photo Industry 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.