Issued Patents All Time
Showing 26–40 of 40 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7132782 | Spark plug and method of producing spark plug | Tomoaki Kato | 2006-11-07 |
| 7045939 | Spark plug having a welded electrode and the method of producing the same | Hideki Teramura, Kiyohiro Kondo | 2006-05-16 |
| 6724133 | Spark plug with nickel alloy electrode base material | Naomichi Miyashita, Yoshihiro Matsubara, Wataru Matsutani, Masayuki Segawa, Hiroaki Kuki | 2004-04-20 |
| 6707237 | Spark plug | Hideki Teramura, Junichi Kagawa | 2004-03-16 |
| 6653768 | Spark plug | Tomoaki Kato | 2003-11-25 |
| 6611084 | Spark plug | Hideki Teramura, Tomoaki Kato | 2003-08-26 |
| 5760532 | Sintered ceramic body for a spark plug | Sugimoto Makoto, Hiroyuki Tanabe, Masahiro Konishi | 1998-06-02 |
| 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 |
| 5477104 | Spark plug resistant to accidental discharges | Hiroyuki Tanabe, Makoto Sugimoto, Masahiro Konishi | 1995-12-19 |
| 5448130 | Spark plug electrode for use in internal combustion engine | Wataru Matsutani | 1995-09-05 |
| 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 |
| 5198394 | Sintered ceramic body, a method of making same and spark plug insulator made therefrom | Makoto Sugimoto, Hiroyuki Tanabe | 1993-03-30 |