Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12332581 | Image formation apparatus having developer cartridge with rotatable shutter lock engagement member | — | 2025-06-17 |
| 11921440 | Developer supply device, development device, and image formation apparatus | — | 2024-03-05 |
| D1009988 | Toner cartridge | Tetsu Koyama, Yoshihiro Goto, Hisatoshi Saito, Akira Saito, Hiroki Haruyama | 2024-01-02 |
| D998033 | Image drum cartridge | Tetsu Koyama, Yoshihiro Goto, Hisatoshi Saito, Akira Saito, Hiroki Haruyama | 2023-09-05 |
| D984529 | Image drum cartridge | Tetsu Koyama, Yoshihiro Goto, Hisatoshi Saito, Akira Saito, Hiroki Haruyama | 2023-04-25 |
| D967891 | Toner cartridge | Tetsu Koyama, Yoshihiro Goto, Hisatoshi Saito, Akira Saito, Hiroki Haruyama | 2022-10-25 |
| 11297479 | Portable wireless device, communication method, and server | Shuichi Chihara, Michiya Mehara | 2022-04-05 |
| 9223249 | Image forming unit and image forming apparatus | Tetsu Koyama | 2015-12-29 |
| 5586497 | Stencil printing machine with stencil tensioning member | — | 1996-12-24 |