Granted Patent
Utility
US 4,272,601 · App. 06/043,760
Coated developer carrier for electrophotography
Inventors:
Hiroshi Tokura, Keiji Sato, Makoto Tomono, Sadatugu Terada, Hideaki Arai
Patented Case
View Patent ↗
Granted: Jun 9, 1981
Filed: May 30, 1979
Inventors
Hiroshi Tokura
Keiji Sato
Makoto Tomono
Sadatugu Terada
Hideaki Arai
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.