Granted Patent
Utility
US 4,372,674 · App. 06/200,977
Copying machine having detectors for the background color and density of the original
Inventors:
Koji Yukawa, Masayuki Miyazaki, Takashi Murahashi
Patented Case
View Patent ↗
Granted: Feb 8, 1983
Filed: Oct 27, 1980
Inventors
Koji Yukawa
Masayuki Miyazaki
Takashi Murahashi
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.