Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9087505 | Ultra-light sound insulator | Toru Inoue, Masaki Ishikawa, Youhei Ishikawa, Sohei Matsuyama | 2015-07-21 |
| 8637145 | Ultra-light sound insulator | Toru Inoue, Masaki Ishikawa, Youhei Ishikawa, Sohei Matsuyama | 2014-01-28 |
| 8194879 | Ultra-light sound insulator | Masaki Ishikawa, Youhei Ishikawa, Sohei Matsuyama | 2012-06-05 |
| 8158246 | Ultralight soundproof material | Toru Inoue, Masaki Ishikawa, Youhei Ishikawa, Sohei Matsuyama | 2012-04-17 |