Granted Patent
Utility
US 4,276,854 · App. 06/093,809
Apparatus for detecting toner density
Inventors:
Hisao Fujita, Yasuhiko Tanaka, Isao Kobayashi, Ken Nakamura
Patented Case
View Patent ↗
Granted: Jul 7, 1981
Filed: Nov 13, 1979
Inventors
Hisao Fujita
Yasuhiko Tanaka
Isao Kobayashi
Ken 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.