Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5184529 | Tool for loosening or tightening spark plug | Yoshiaki Matsubara, Takao Kojima | 1993-02-09 |
| 4909071 | Spark plug pressure sensor | Yoshiaki Saiki, Shuzo Matsumura | 1990-03-20 |