Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10233793 | Valve seat of sintered iron-based alloy | Akiko SHIMADA | 2019-03-19 |
| 9359921 | Sintered iron-based alloy valve seat | Kimiaki Hashimoto | 2016-06-07 |
| 8844903 | Valve seat | Rintarou Takahashi | 2014-09-30 |
| 7241327 | Iron-based sintered alloy with dispersed hard particles | Akiyoshi Ishibashi | 2007-07-10 |
| 6802883 | Iron-based sintered alloy for use as valve seat and its production method | Akiyoshi Ishibashi | 2004-10-12 |