Granted Patent
Utility
US 4,264,699 · App. 06/070,456
Liquid developer for use in electrophotography
Inventors:
Kazuo Tsubuko, Taro Kimura, Tsuneo Kurotori
Patented Case
View Patent ↗
Granted: Apr 28, 1981
Filed: Aug 28, 1979
Inventors
Kazuo Tsubuko
Taro Kimura
Tsuneo Kurotori
Assignee (at issue)
RICOH COMPANY, 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.