Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5804309 | Charging roll | Tetsuya Itoh, Takafumi Yamamoto, Hiroki Sugiura, Atsuhiro Kawano, Wataru Imamura | 1998-09-08 |
| 5768668 | Toner supply roll having openings in skin layer of porous cylindrical polyurethane sponge structure, and method of producing the same | Keita Shiraki, Akitoshi Nozawa, Mitsuyoshi Kondo | 1998-06-16 |
| 5753154 | Method of producing a conductive roll | Keita Shiraki, Takafumi Yamamoto | 1998-05-19 |
| 5609554 | Conductive roll | Keita Shiraki, Takafumi Yamamoto | 1997-03-11 |
| 5604031 | Electrically conductive roll whose base layer is formed of ion-conductive elastic material | Takafumi Yamamoto, Sumio Oinuma, Kazutoshi Soumiya, Hiroyasu Kato | 1997-02-18 |
| 5455077 | Method of producing a crowned resilient roll with coating layer | Takafumi Yamamoto, Masaaki Inubushi, Sumio Oinuma, Shigeru Nishijima, Masaharu Ishikawa | 1995-10-03 |
| 5378525 | Crowned resilient roll with coating layer and method of producing the same | Takafumi Yamamoto, Masaaki Inubushi, Sumio Oinuma, Shigeru Nishijima, Masaharu Ishikawa | 1995-01-03 |