Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9065257 | Method of manufacturing electrode complex for forming electrode of spark plug, and method of manufacturing spark plug | Hiroshi Ichihara | 2015-06-23 |
| 8469759 | Method of manufacturing spark plug | Yasuhiro Hori | 2013-06-25 |