Granted Patent
Utility
US 4,426,434 · App. 06/388,192
Electrophotographic photoreceptor and preparation thereof
Inventors:
Koichi Arishima, Takeshi Okada, Akiyuki Tate, Hiroaki Hiratsuka
Patented Case
View Patent ↗
Granted: Jan 17, 1984
Filed: Jun 14, 1982
Inventors
Koichi Arishima
Takeshi Okada
Akiyuki Tate
Hiroaki Hiratsuka
Assignee (at issue)
Nippon Telegraph and Telephone Public Corporation
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.