Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6078671 | Silencer for attenuating a sound or noise transmitted through an air passage of a duct | Masayoshi Ikeda | 2000-06-20 |
| 5832993 | Heat-exchange element | Naruo Ohata, Toru Saito, Kenji Odashima | 1998-11-10 |