Granted Patent
Utility
US 4,837,137 · App. 07/127,921
Electrophotographic photoreceptor
Inventors:
Koichi Aizawa, Toyoki Kazama, Yukio Takano, Yukihisa Tamura
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Dec 2, 1987
Inventors
Koichi Aizawa
Toyoki Kazama
Yukio Takano
Yukihisa Tamura
Assignee (at issue)
FUJI ELECTRIC 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.