Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7912411 | Developing roller and imaging apparatus using the same | Koji Takagi, Shuyou Akama | 2011-03-22 |
| D319005 | Nut | Kiyoshi Sakayori | 1991-08-13 |
| 4815920 | Lock nut with synthetic resin threading | — | 1989-03-28 |