Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10501950 | Method for injecting injection filler into concrete structure and syringe therefor | — | 2019-12-10 |
| RE43758 | Spark plug with alloy chip | Wataru Matsutani | 2012-10-23 |
| 6707237 | Spark plug | Hideki Teramura, Mamoru Musasa | 2004-03-16 |
| 6064143 | Multielectrode spark plug | — | 2000-05-16 |
| 5866973 | Spark plug having a platinum tip on an outer electrode | Wataru Matsutani | 1999-02-02 |
| 5793793 | Spark plug | Wataru Matsutani | 1998-08-11 |
| 5793151 | Creeping discharge spark plug | Kozo Amano, Yoshihiro Matsubara | 1998-08-11 |
| 5574329 | Spark plug and a method of making the same for an internal combustion engine | — | 1996-11-12 |
| 5556315 | Method of making a spark plug for an internal combustion engine | — | 1996-09-17 |
| 5497045 | Spark plug having a noble metal electrode portion | Wataru Matsutani | 1996-03-05 |
| 5478265 | Spark plug and a method of making of same | Wataru Matsutani | 1995-12-26 |
| 5461276 | Electrode for a spark plug in which a firing tip is laser welded to a front end thereof | Wataru Matsutani | 1995-10-24 |
| 5461210 | Method of manufacturing a spark plug electrode | Wataru Matsutani | 1995-10-24 |
| 5347856 | Misfire detector device for use in an internal combustion engine | Shigeru Miyata, Yoshihiro Matsubara | 1994-09-20 |
| 5347855 | Misfire detector device for use in an internal combustion engine | Shigeru Miyata, Yoshihiro Matsubara | 1994-09-20 |
| 5189333 | Multi-gap spark plug for an internal combustion engine | Masaaki Murase, Shinichi Nakamura | 1993-02-23 |
| 5144188 | Spark plug for internal combustion engine | Wataru Matsutani | 1992-09-01 |
| 4914343 | Spark plug with counterelectrode having plural apertures in flat portion thereof | Wataru Matsutani, Alfred Krappel, Josef Holzmann, Johannes Guggenmos | 1990-04-03 |
| 4904216 | Process for producing the center electrode of spark plug | Toru Hayashi | 1990-02-27 |
| 4881403 | Spark plug with pressure sensor | Yoshiaki Saiki, Kozo Amano | 1989-11-21 |
| 4838218 | Ceramic valve supporting structure in use for internal combustion engine | Yasushi Sato, Shigeru Nagasaki, Masato Taniguchi, Mitsuyoshi Kawamura | 1989-06-13 |
| 4814665 | Center electrode structure for spark plug | Akio Sakura, Mitsutaka Yoshida | 1989-03-21 |
| 4808135 | Center electrode structure for spark plug | Akio Sakura, Mitsutaka Yoshida | 1989-02-28 |
| 4786267 | Spark plug | Akihiro Toya, Takashi Yamaguchi, Kazunori Yokota | 1988-11-22 |
| 4743793 | Spark plug | Akihiro Toya, Takashi Yamaguchi, Kazunori Yokota | 1988-05-10 |