Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6717357 | Organic electroluminescent display panel | Kenichi Okuyama, Kenichi Nagayama | 2004-04-06 |
| 6310430 | Spark plug having a metallic terminal within a through-hole | — | 2001-10-30 |
| 6189522 | Waste-spark engine ignition | — | 2001-02-20 |
| 6170451 | Spark plug | — | 2001-01-09 |
| 5239225 | Spark plug for use in internal combustion engine | Tunekazu Enomoto, Mitsutaka Yoshida | 1993-08-24 |
| 5109178 | Spark plug for internal combustion engine | Mitsutaka Yoshida, Akihiro Toya, Akihisa Harada, Eigo Goto, Makoto Sugimoto | 1992-04-28 |