Granted Patent
Utility
US 4,908,291 · App. 07/273,107
Method of regulating the thickness of a developer layer containing magnetic carrier and toner particles
Inventors:
Hiroshi Fuma, Akihiko Tamura, Masahiko Itaya, Hisashi Shoji, Shinobu Soma
Patented Case
View Patent ↗
Granted: Mar 13, 1990
Filed: Nov 16, 1988
Inventors
Hiroshi Fuma
Akihiko Tamura
Masahiko Itaya
Hisashi Shoji
Shinobu Soma
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.