Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8398447 | Method for manufacturing spark plug for internal-combustion engine | Ken Hanashi, Satoru Kadowaki, Tsunenobu Hori, Kenka Tsubota, Hiroya Ishiguro | 2013-03-19 |
| 8339021 | Spark plug for internal-combustion engine and method for manufacturing the same | Ken Hanashi, Satoru Kadowaki, Tsunenobu Hori, Kenka Tsubota, Hiroya Ishiguro | 2012-12-25 |