Granted Patent
Utility
US 4,874,683 · App. 07/241,832
Liquid developer for electrophotography
Inventors:
Miyuki Shirai, Akira Nogami
Patented Case
View Patent ↗
Granted: Oct 17, 1989
Filed: Sep 6, 1988
Inventors
Miyuki Shirai
Akira Nogami
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.