Granted Patent
Utility
US 4,313,671 · App. 06/028,203
Method and apparatus for controlling image density in an electrophotographic copying machine
Inventor:
Hiroshi Kuru
Patented Case
View Patent ↗
Granted: Feb 2, 1982
Filed: Apr 9, 1979
Inventor
Hiroshi Kuru
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.