Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4331899 | Spark plug | Tadashi Hattori, Akira Tanaka | 1982-05-25 |
| 4330529 | Antibacterial composition | Hiroshi Imanaka | 1982-05-18 |
| 4329615 | Spark plug for internal combustion engines | Akira Tanaka, Tadashi Hattori | 1982-05-11 |