Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5845184 | Developing unit having improved toner density control | Akira Nagahara, Yoshio Yamaguchi, Shigenobu Utaka, Toshio Tooda, Haruyasu Watanabe +4 more | 1998-12-01 |
| 5778285 | Image forming apparatus for collecting residual toner from a drum using an AC voltage | Akira Nagahara, Sachio Sasaki, Shigenobu Utaka, Yoshio Yamaguchi, Mitsuru Sato +3 more | 1998-07-07 |
| 5678143 | Image forming apparatus for collecting residual toner from a drum using an AC voltage | Akira Nagahara, Sachio Sasaki, Shigenobu Utaka, Yoshio Yamaguchi, Mitsuru Sato +3 more | 1997-10-14 |
| 5587774 | Cleanerless electrographic imaging device | Akira Nagahara, Sachio Sasaki, Tsuneo Watanuki, Norio Sawatari, Mikio Amaya +1 more | 1996-12-24 |
| 5530528 | Image forming apparatus having contact type, one-component developing unit | Yoji Houki, Makoto Matsuoka, Takeo Kojima, Akira Takahashi, Hiroshi Kera | 1996-06-25 |