Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6407487 | Spark plug, alumina insulator for spark plug, and method of manufacturing the same | — | 2002-06-18 |
| 6366008 | Spark plug and method of making the same | Osamu Fukushima, Hiroyuki Tanabe | 2002-04-02 |
| 6341501 | Method of producing a spark plug | Yutaka Tanaka | 2002-01-29 |
| 6334800 | Manufacturing method of resistor-incorporated spark plug | Kenichi Nishikawa, Yutaka Tanaka, Toshitaka Honda | 2002-01-01 |