Granted Patent
Utility
US 4,473,028 · App. 06/402,725
Developing device
Inventors:
Kunio Ito, Ken Nakamura
Patented Case
View Patent ↗
Granted: Sep 25, 1984
Filed: Jul 28, 1982
Inventors
Kunio Ito
Ken Nakamura
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.