Granted Patent
Utility
US 4,486,821 · App. 06/398,890
Power source for a developing bias
Inventor:
Haruo Itakura
Patented Case
View Patent ↗
Granted: Dec 4, 1984
Filed: Jul 16, 1982
Inventor
Haruo Itakura
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.