Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7150252 | Spark plug and internal combustion engine equipped with the spark plug | Yoshihisa Sugiyama, Katsutoshi Nakayama | 2006-12-19 |
TW
Takeru Wakamatsu
Overall (All Time): #3,436,627 of 4,157,543Top 85%
1
Patents All Time