Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12362115 | Vacuum interrupter | Hideaki Fukuda, Hiroki Narita | 2025-07-15 |
| 8449343 | Discharge lamp having a heat resistant film and method for producing same | Yoshihide Nishiyama | 2013-05-28 |
| 8405311 | Discharge lamp preventing devitrification, light source device, and projector | Yoshihide Nishiyama | 2013-03-26 |
| 8401443 | Toner-particle bearing roller, developing device, and image forming apparatus | Yoichi Yamada, Tomohiro Aruga, Katsumi Okamoto, Hiroshi Kato, Masanao Kunugi +1 more | 2013-03-19 |
| 8192339 | Developing roller, manufacturing method thereof, developing apparatus and image forming apparatus | Junichi Suzuki | 2012-06-05 |
| 8087170 | Developing agent carrier manufacturing method, developing agent carrier, developing device and image forming apparatus | Yoichi Yamada, Junichi Nakahara, Masanao Kunugi, Tomohiro Aruga, Katsumi Okamoto | 2012-01-03 |
| 8086150 | Toner particle-bearing roller with projection portion, developing device having such toner particle-bearing roller, and image forming apparatus having such developing device | Yoichi Yamada, Tomohiro Aruga | 2011-12-27 |
| 7565099 | Developing device and image forming apparatus having a toner-particle bearing roller with a helical groove portion | Yoichi Yamada, Tomohiro Aruga, Masanao Kunugi, Katsumi Okamoto, Hiroshi Kato | 2009-07-21 |
| 7555252 | Image forming apparatus that prevents conspicuous unevenness in image density | Tomohiro Aruga, Yoichi Yamada, Takatomo Fukumoto | 2009-06-30 |
| 5148334 | Phase synchronization circuit | Takikazu Takeuchi, Hiroyuki Yokohara, Takuji Ogawa | 1992-09-15 |