Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5692482 | Ignition coil for internal combustion engine | Takeshi Shimizu, Koji Waki, Shigemi Murata, Mitsuru Koiwa, Toshio Maekawa | 1997-12-02 |
| 5634453 | Ignition apparatus for internal combustion engine | Mitsuru Koiwa | 1997-06-03 |
| 5628297 | Ignition apparatus for internal combustion engine | Mitsuru Koiwa | 1997-05-13 |