Granted Patent
Utility
US 5,804,309 · App. 08/820,282
Charging roll
Inventors:
Tetsuya Itoh, Takafumi Yamamoto, Hiroki Sugiura, Atsuhiro Kawano, Wataru Imamura, Saburou Hayashi
Patented Case
View Patent ↗
Granted: Sep 8, 1998
Filed: Mar 18, 1997
Inventors
Tetsuya Itoh
Takafumi Yamamoto
Hiroki Sugiura
Atsuhiro Kawano
Wataru Imamura
Saburou Hayashi
Assignee (at issue)
TOKAI RUBBER INDUSTRIES, 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.