Granted Patent
Utility
US 4,313,343 · App. 06/059,134
Apparatus for detecting remaining quantity of toner in electrophotographic copying machine
Inventors:
Isao Kobayashi, Hideo Akimoto, Yoshiyuki Takahashi, Tokio Hibiya, Masayuki Hata
Patented Case
View Patent ↗
Granted: Feb 2, 1982
Filed: Jul 20, 1979
Inventors
Isao Kobayashi
Hideo Akimoto
Yoshiyuki Takahashi
Tokio Hibiya
Masayuki Hata
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.