Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6798125 | Spark plug having ground electrode made of NI alloy and noble metal wear resistant portion | Yoshihisa Sugiyama | 2004-09-28 |
YS
Yoshitaka Sugiura
Overall (All Time): #3,491,493 of 4,157,543Top 85%
1
Patents All Time