Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6621198 | Spark plug having iridum alloy tip, iron-based alloy tip bonding portion and stress relieving layer therebetween | Keiji Kanao | 2003-09-16 |
| 5209195 | Ignition distributor | Yoshitaka Sato, Hideo Asakura | 1993-05-11 |
| 4732593 | Sintered ceramic filter structure having body compressively stressed by sintered ceramic material having different sintering shrinkage ratio | Hiroshi Kondo, Yukihisa Takeuchi, Hitoshi Yoshida | 1988-03-22 |