Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12343778 | Die for ironing working and die module | Kenichi Takao, Ryozo Shiroishi, Masahiro Shimamura, Naoya Matsumoto | 2025-07-01 |
| 12157602 | Aluminum can | Norihisa Hirota, Ryozo Shiroishi, Kenichi Takao | 2024-12-03 |
| 12036597 | Jig for metal plastic working | Tomohiro Ogawa, Ryozo Shiroishi, Naoya Matsumoto, Masahiro Shimamura | 2024-07-16 |
| 11745245 | Metallic worked articles | Ryozo Shiroishi, Naoya Matsumoto, Masahiro Shimamura, Tomohiro Ogawa | 2023-09-05 |
| 11338954 | Aluminum can | Norihisa Hirota, Ryozo Shiroishi, Kenichi Takao | 2022-05-24 |
| 11267033 | Mold and method for manufacturing drawn can | Ryozo Shiroishi, Kenichi Takao | 2022-03-08 |