Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882455 | Electronic circuit substrates | Shinji Saito, Hidetoshi Yamauchi | 1989-11-21 |
| 4853582 | Spark plug for use in internal combustion engine | Masaki Sugata, Hiroyuki Murai | 1989-08-01 |
| 4845400 | Spark plug for internal-combustion engine | Kozo Takamura, Hiroyuki Murai | 1989-07-04 |