Granted Patent
Utility
US 4,450,221 · App. 06/390,828
Encapsulated lyophilic magnetic particle and resin toner
Inventors:
Sadatugu Terada, Satoshi Haneda, Makoto Tomono, Syunji Matsuo
Patented Case
View Patent ↗
Granted: May 22, 1984
Filed: Jun 22, 1982
Inventors
Sadatugu Terada
Satoshi Haneda
Makoto Tomono
Syunji Matsuo
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.