Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4833506 | Method and apparatus for controlling toner density of copying device | Tomio Arai | 1989-05-23 |
| 4801980 | Toner density control apparatus | Tomio Arai | 1989-01-31 |
| 4595279 | Recording apparatus with speed control | Hirofumi Sakaguchi, Takao Shiozawa | 1986-06-17 |
| 4367944 | Charging potential control means for electrophotographic copiers | — | 1983-01-11 |
| 4313671 | Method and apparatus for controlling image density in an electrophotographic copying machine | — | 1982-02-02 |
| 4314242 | Apparatus for detecting a residual quantity of toner | Mitsuo Akiyama, Isao Ikemoto | 1982-02-02 |
| 4272182 | Apparatus for controlling the density of a reproduced image in an electrophotographic copying machine | Shunichi Abe, Mistuo Akiyama, Fumio Iwai | 1981-06-09 |
| 4248527 | Apparatus for controlling toner concentration in electrophotographic copying machines | Mistuo Akiyama | 1981-02-03 |