Granted Patent
Utility
US 4,559,898 · App. 06/435,614
Developing unit
Inventors:
Masakazu Fukuchi, Keiji Oishi, Yasuyuki Iwai
Patented Case
View Patent ↗
Granted: Dec 24, 1985
Filed: Oct 20, 1982
Inventors
Masakazu Fukuchi
Keiji Oishi
Yasuyuki Iwai
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.