Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5602927 | Vehicle internal noise reduction system and the method thereof | Hiroshi Iidaka, Eiji Shibata | 1997-02-11 |
| 5581619 | Vehicle internal noise reduction system and method | Eiji Shibata, Hiroshi Iidaka | 1996-12-03 |
| 5553154 | Vehicle internal noise reduction system and the method thereof | Hiroshi Iidaka, Eiji Shibata | 1996-09-03 |
| 5493616 | Vehicle internal noise reduction system | Hiroshi Iidaka, Eiji Shibata | 1996-02-20 |
| 5488667 | Vehicle internal noise reduction system | Hiroshi Iidaka, Eiji Shibata | 1996-01-30 |
| 5485523 | Active noise reduction system for automobile compartment | Hiroshi Iidaka, Kazuyuki Kondo, Keitaro Yokota | 1996-01-16 |
| 5473699 | Vehicle internal noise reduction system | Hiroshi Iidaka, Eiji Shibata | 1995-12-05 |
| 5426704 | Noise reducing apparatus | Eiji Shibata, Hiroshi Iidaka, Manabu Nohara | 1995-06-20 |
| 5426705 | Vehicle internal noise reduction system | Keitaro Yokota, Kazuyuki Kondo, Hiroshi Iitaka | 1995-06-20 |
| 5408532 | Vehicle internal noise reduction system | Keitaro Yokota, Eiji Shibata, Hiroshi Iitaka | 1995-04-18 |