Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5370832 | Sintered ceramic body for a spark plug insulator and method of sintering the same | Makoto Sugimoto, Hiroyuki Tanabe, Masahiro Konishi | 1994-12-06 |
| 5320569 | Method of making a spark plug | Takafumi Oshima, Tsutomu Okayama, Kazuya Iwata | 1994-06-14 |
| 5283134 | Spark plug insulator and a method of sintering | Makoto Sugimoto, Hiroyuki Tanabe | 1994-02-01 |