Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8639167 | Developing device and image forming device | Kanji Nakayama, Masayasu Haga, Tomohisa Yoshida, Wataru Onoda, Noboru Ito | 2014-01-28 |
| 6136487 | Developing method | Tamotsu Shimizu, Noboru Ito, Yoshio Sakagawa | 2000-10-24 |
| 5999782 | Developing device having an AC current with two frequencies and method of using same | Yoshio Sakagawa, Tamotsu Shimizu | 1999-12-07 |
| 5884131 | Developing device which accomplishes development using the action of an alternating current field between a developer-carrying member and an image-carrying member | Tamotsu Shimizu, Yoshio Sakagawa | 1999-03-16 |
| 5860040 | Developing apparatus having stop period during which no AC electric field is exerted between developer carrying member and image carrying member | Tamotsu Shimizu, Yoshio Sakagawa | 1999-01-12 |
| 5815781 | Development device | — | 1998-09-29 |