Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4312309 | Helically-shaped intake port of an internal combustion engine | Kiyoshi Nakanishi | 1982-01-26 |
| 4308832 | Helically shaped intake port of an internal combustion engine | Hiroshi Ikeda | 1982-01-05 |