Issued Patents 2022
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11448142 | Exhaust valve device for vehicle | Toshiaki Ishii, Makoto Koyama, Naoki Tanaka | 2022-09-20 |
| 11287046 | Valve device | Naoki Tanaka, Keigo Suzuki, Katsunari Tobe | 2022-03-29 |