Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6470845 | Spark plug for internal combustion engine | — | 2002-10-29 |
| 6373172 | Spark plug for internal combustion engine having a straight pillar ground electrode | Tunenobu Hori | 2002-04-16 |
| 6346766 | Spark plug for internal combustion engine and method for manufacturing same | Tsunenobu Hori | 2002-02-12 |
| 6337533 | Spark plug for internal combustion engine and method for manufacturing same | Ken Hanashi, Tsunetoshi Goto | 2002-01-08 |