Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7083488 | Method for manufacturing spark plug and apparatus for manufacturing spark plug | Yutaka Taniguchi | 2006-08-01 |
| 6997767 | Method for manufacturing a spark plug, and spark plug | Yutaka Taniguchi, Akio Sakura | 2006-02-14 |