Granted Patent
Utility
US 4,544,263 · App. 06/549,587
Copying machine having an image density control device
Inventors:
Koji Sasaki, Eiichi Yoshida, Akira Sawaki
Patented Case
View Patent ↗
Granted: Oct 1, 1985
Filed: Nov 7, 1983
Inventors
Koji Sasaki
Eiichi Yoshida
Akira Sawaki
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.