Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4834213 | Noise silencer for use in joint gap in highway | Ikuro Yamamoto | 1989-05-30 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4834213 | Noise silencer for use in joint gap in highway | Ikuro Yamamoto | 1989-05-30 |