Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6736160 | Valve structure for engine exhaust system | Tadashi Nagai, Eiichiro Hashimoto, Masaomi Fukuhara, Tamio Oshima | 2004-05-18 |
| 6637449 | Pressure sensible valve for exhaust muffler and method of assembling same | Tadashi Nagai | 2003-10-28 |
| 6581721 | Valve for a control muffler | Tadashi Nagai | 2003-06-24 |