Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4640129 | Method and apparatus for detecting toner concentration of two-component dry developer | Seiichi Miyakawa, Koji Sakamoto | 1987-02-03 |
| RE32330 | Method of maintaining the correct conditions of an electrophotographically duplicated image | Seiichi Miyakawa, Koji Sakamoto | 1987-01-13 |
| 4614682 | Thermosensitive image transfer recording medium | Akira Suzuki, Hideo Watanabe, Mitsuru Hashimoto, Nobuo Mochizuki, Keishi Kubo +1 more | 1986-09-30 |
| 4423134 | Developing unit for electrophotography | Seiichi Miyakawa, Akira Midorikawa, Kenzo Ariyama | 1983-12-27 |
| 4415533 | Process for treating exhaust gas from electrophotographic machine and apparatus thereof | Tsuneo Kurotori, Manabu Mochizuki | 1983-11-15 |
| 4330749 | Electrometer apparatus | Tadahiro Eda, Chikara Imai | 1982-05-18 |
| 4318042 | Electrometer probe | Tadahiro Eda, Chikara Imai | 1982-03-02 |
| 4306804 | Exposure control and other component control for electrostatic copying machine | Koji Sakamoto, Seiichi Miyakawa | 1981-12-22 |
| 4279498 | Electrostatographic copying apparatus with automatic toner density control | Tadahiro Eda, Chikara Imai, Yasushi Koichi | 1981-07-21 |
| 4277549 | Copy image adjustment method | Tadahiro Eda, Chikara Imai | 1981-07-07 |
| 4277163 | Variable magnification electrostatic copying machine | Masumi Ikesue, Takashi Yano, Hiroyuki Idenawa, Isao Nakamura, Tatsuo Tani | 1981-07-07 |
| 4266870 | Electrostatographic apparatus comprising developing bias means | Tadahiro Eda, Chikara Imai | 1981-05-12 |
| 4239374 | Electrostatographic apparatus comprising automatic document type determination means | Masumi Ikesue, Masao Hosaka, Nobuo Kasahara | 1980-12-16 |
| 4226525 | Electrostatic copying machine | Koji Sakamoto, Seiichi Miyakawa | 1980-10-07 |
| 4215930 | Method of maintaining the correct conditions of an electrophotographically duplicated image | Seiichi Miyakawa, Koji Sakamoto | 1980-08-05 |
| 4213693 | Electrostatographic apparatus comprising improved developing bias control | Chikara Imai, Tadahiro Eda | 1980-07-22 |
| 4210864 | Apparatus for sensing toner density using a stationary ferromagnetic mass within the toner to increase sensitivity | Seiichi Miyakawa, Koji Sakamoto, Yoshihiro Ogata | 1980-07-01 |
| 4200391 | Electrostatographic apparatus comprising document density sensing means | Koji Sakamoto, Chikara Imai | 1980-04-29 |
| 4195260 | Apparatus for sensing deterioration of developing substance including ferromagnetic carrier and non-magnetic toner particles | Koji Sakamoto, Seiichi Miyakawa | 1980-03-25 |