Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5821435 | Exhaust gas measuring apparatus | — | 1998-10-13 |
| 5712433 | Exhaust gas measuring apparatus | — | 1998-01-27 |
| 4814143 | Exhaust-gas analyzing device | Hiroji Kohsaka, Hisao Matsui | 1989-03-21 |