Issued Patents 2005
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6891318 | Structure of spark plug designed to provide higher durability and fabrication method thereof | Akihiko Mizutani, Hironori Osamura, Kozo Takamura | 2005-05-10 |
| 6885135 | Spark plug and its manufacturing method | Keiji Kanao | 2005-04-26 |
| 6853116 | Structure of spark plug designed to provide higher durability and ignitability of fuel | Keiji Kanao | 2005-02-08 |