Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12319842 | Production process of polishing stone and polishing stone | — | 2025-06-03 |
| 10562154 | Cutting blade | Ryuji Oshima, Yoshiki Ishiai | 2020-02-18 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12319842 | Production process of polishing stone and polishing stone | — | 2025-06-03 |
| 10562154 | Cutting blade | Ryuji Oshima, Yoshiki Ishiai | 2020-02-18 |