Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8013503 | Spark plug for internal combustion engine having ground electrode with thick, thin and stepped portion and method for producing the spark plug | Hiroyuki Kameda, Satoshi Nagasawa | 2011-09-06 |
| 8013504 | Spark plug for internal combustion engine and method for producing the spark plug | Hiroyuki Kameda, Satoshi Nagasawa | 2011-09-06 |
| 7906894 | Spark plug for internal combustion engine | Hiroyuki Kameda, Tomoaki Kato | 2011-03-15 |