Issued Patents 2011
Showing 1–4 of 4 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 | Katsutoshi Nakayama, Satoshi Nagasawa | 2011-09-06 |
| 8013504 | Spark plug for internal combustion engine and method for producing the spark plug | Katsutoshi Nakayama, Satoshi Nagasawa | 2011-09-06 |
| 7924669 | Optical disk device and recording method | Takayuki Ono | 2011-04-12 |
| 7906894 | Spark plug for internal combustion engine | Tomoaki Kato, Katsutoshi Nakayama | 2011-03-15 |