Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12210306 | Image forming system, resistance detection device, resistance detection method, and program | Yuhei Tatsumoto, Akimasa Ishikawa, Yuta Tachibana, Kouei Cho | 2025-01-28 |
| 11300911 | Image forming device | Yasuhiro KOIDE, Yoshihito Sasamoto, Yuhei Tatsumoto | 2022-04-12 |
| 10766252 | Heater and inkjet printer | Yasuhiro Ishihara, Yuhei Tatsumoto, Toshikazu Higashi | 2020-09-08 |
| 10474079 | Image forming device that detects a state of an image carrier | Akihiro Hayashi, Yuhei Tatsumoto, Koji Ohara, Yasuhiro KOIDE | 2019-11-12 |
| 10263525 | Power supply device and image forming apparatus | Yuhei Tatsumoto, Masayuki Watanabe, Akihiro Hayashi | 2019-04-16 |
| 10234814 | Power supply apparatus and image forming apparatus | Masayuki Watanabe, Yuhei Tatsumoto, Akihiro Hayashi | 2019-03-19 |
| 10007224 | Power supply device changing target voltage depending on operation mode, and image forming device having power supply device | Masayuki Watanabe, Yuhei Tatsumoto, Akihiro Hayashi | 2018-06-26 |
| 9671711 | Image forming apparatus | Akihiro Hayashi, Hiroyuki Yoshikawa, Toshikazu Higashi | 2017-06-06 |
| 6782226 | Developing device | Junji Machida, Hidetoshi Miyamoto, Tetsumaru Fujita, Masahiko Matsuura, Yoshiko Yaoi +1 more | 2004-08-24 |
| 5845172 | Image forming apparatus having rotatable charging brush with varying charging voltage | Hitoshi Saito, Masashi Yamamoto | 1998-12-01 |
| 5717980 | Image forming device with transfer unit | Takeki Oka, Munenori Nakano, Hirohisa Shirai | 1998-02-10 |