Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6641969 | Magnetic toner with negative polarity for developing latent electrostatic images, and image forming apparatus using the same | Osamu Uchinokura | 2003-11-04 |
| 6630276 | EXTERNAL ADDITIVE FOR ELECTROPHOTOGRAPHIC TONER, METHOD FOR MANUFACTURING THE EXTERNAL ADDITIVE, ELECTROPHOTOGRAPHIC TONER USING THE EXTERNAL ADDITIVE, AND IMAGE FORMING APPARATUS USING THE ELECTROPHOTOGRAPHIC TONER | Hideki Sugiura | 2003-10-07 |
| 6503676 | Toner, external additive therefor and image forming method using the toner | Hiroshi Yamashita, Hideki Sugiura, Hachiroh Tosaka, Osamu Uchinokura, Hitoshi Ueda +1 more | 2003-01-07 |