Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10052719 | Laser welding device, laser welding method, and battery casing | Shigeki Saito | 2018-08-21 |
| 9252569 | Spark plug | Tomoaki Kato | 2016-02-02 |
| 9065255 | Spark plug and method of manufacturing the same | Shinya Mitsuda, Tomoaki Kato, Ryuichi Ono | 2015-06-23 |
| 8841827 | Spark plug with improved resistance to spark-induced erosion of the ground electrode tip | Katsutoshi Nakayama | 2014-09-23 |
| 8810118 | Spark plug | — | 2014-08-19 |
| 8624473 | Spark plug | Katsutoshi Nakayama | 2014-01-07 |
| 8506341 | Method of manufacturing sparkplugs | Katsutoshi Nakayama | 2013-08-13 |
| 8487520 | Spark plug and method of manufacturing the same | Katsutoshi Nakayama | 2013-07-16 |
| 8354782 | Spark plug | Katsutoshi Nakayama | 2013-01-15 |
| 8264131 | Spark plug | Katsutoshi Nakayama | 2012-09-11 |
| 8212463 | Spark plug and its manufacturing method | Katsutoshi Nakayama | 2012-07-03 |