Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4670684 | Spark plug | Takafumi Oshima | 1987-06-02 |
| 4659960 | Electrode structure for a spark plug | Akihiro Toya, Kazunori Yokota, Hiroaki Mori | 1987-04-21 |
| 4329174 | Nickel alloy for spark plug electrodes | Tsuneo Ito | 1982-05-11 |