Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5920749 | Image forming apparatus with time delayed cooling control | Tsutomu Sugaya, Makoto Okado | 1999-07-06 |
| 4975742 | Toner density control device | Tomio Tada | 1990-12-04 |
| 4974020 | Removable developing units for a copying machine and display for indicating the useful life of the machine | Kazunori Akiyama | 1990-11-27 |
| D312272 | Developer cartridge | Kazunori Akiyama | 1990-11-20 |
| D308696 | Process unit for copying machine | Akiyoshi Tanizawa, Kazunori Akiyama | 1990-06-19 |
| 4908668 | Image-forming machine | Kazunori Akiyama | 1990-03-13 |
| 4894688 | Device for circulating developer | Masami Taniguchi | 1990-01-16 |
| 4875077 | Image-forming machine | Kazunori Akiyama | 1989-10-17 |
| 4873549 | Device for detecting the life of an image forming process unit, opening of a seal of the unit and attachment of the unit to an image forming apparatus | Tomio Tada, Junichi Hirobe, Kazuto Hori, Yukihiro Aikawa | 1989-10-10 |
| 4829334 | Image-forming machine having a cover member for covering part of an image bearing member | Kazunori Akiyama | 1989-05-09 |
| 4768055 | Image forming machine having a toner recycling unit | Kazunori Akiyama | 1988-08-30 |