Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4481124 | Thermal shock resistant porous sound absorbing body | Mitsuru Koketsu, Yoshihiro Ohta, Seigo Satomi | 1984-11-06 |
| 4450931 | Structure for decreasing low frequency air vibration | Mitsuyasu Yamashita, Hiroshi Igarashi | 1984-05-29 |