Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5206689 | Copy ratio setting apparatus | — | 1993-04-27 |
| 5122834 | Developing apparatus for determining decreased concentration of toner | Hiroshi Okamoto, Chujiro Yokoyama, Moriyoshi Matsushiro | 1992-06-16 |
| 5089848 | Abnormal charge and toner density detecting system and method for use in an electrostatic copier | Masahide Ueda, Takashi Onishi, Tadafumi Shimizu | 1992-02-18 |
| 5041876 | Multi-color image forming apparatus incorporating selectively operable developing units for one cycle copying | — | 1991-08-20 |
| 5025288 | Image forming apparatus capable of preventing simultaneous rotation of the magnet roll and the developing sleeve | — | 1991-06-18 |
| 4990968 | Multi-colored image forming apparatus | — | 1991-02-05 |
| 4989049 | Multi-color image forming apparatus | Takafumi Tottori, Masaru Komura | 1991-01-29 |
| 4884096 | Multiple color image forming apparatus | Takafumi Tottori | 1989-11-28 |