Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5702998 | Sintered ceramic body for a spark plug insulator and method of sintering the same | Makoto Sugimoto, Hiroyuki Tanabe, Masahiro Konishi | 1997-12-30 |
| 5607605 | Laser welding device, a method of checking welding condition and a method of making a center electrode for a spark plug | Wataru Matsutani | 1997-03-04 |