Granted Patent
Utility
US 4,365,894 · App. 06/154,146
Method for controlling toner concentration
Inventor:
Hiroya Nakamura
Patented Case
View Patent ↗
Granted: Dec 28, 1982
Filed: May 28, 1980
Inventor
Hiroya 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.