Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7309848 | Sealing structure of ceramic heater | Makoto Shirai, Kenji Fukaya | 2007-12-18 |
| 7078659 | Corrosion resistance structure of ceramic heater and gas sensor equipped with same | Taiji Yokoyama, Makoto Shirai | 2006-07-18 |
| 6891318 | Structure of spark plug designed to provide higher durability and fabrication method thereof | Tsunenobu Hori, Akihiko Mizutani, Hironori Osamura | 2005-05-10 |
| 6676468 | Method of producing a spark plug | Hiroya Ishiguro, Toshikazu Shimizu | 2004-01-13 |
| 6466123 | Temperature sensor and method of manufacturing same | Kaoru Kuzuoka | 2002-10-15 |
| 5563469 | Spark plug for internal combustion engine | Yasuyuki Sato, Kiyoaki Tanaka | 1996-10-08 |
| 5557158 | Spark plug and method of producing the same | Keiji Kanao | 1996-09-17 |
| 5502352 | Spark plug having horizontal discharge | Akio Katoh | 1996-03-26 |
| 5488262 | Spark electrode having low thermal stress | — | 1996-01-30 |
| RE35012 | Spark plug for internal combustion engines having an alloy layer between the electrodes and tip ends | Yasuyuki Sato, Kanji Higuchi | 1995-08-08 |
| 5406166 | Long life spark plug having consumable discharge member | Nobuo Abe, Akio Katoh | 1995-04-11 |
| 5202601 | Spark plug for internal combustion engine with recess in electrode tip | Yasuyuki Sato, Kiyoaki Tanaka | 1993-04-13 |
| 5196760 | Spark plug for internal combustion engine with pillar shaped electrode | Kiyoaki Tanaka | 1993-03-23 |
| 5159232 | Spark plugs for internal-combustion engines | Yasuyuki Sato, Hiroyuki Murai | 1992-10-27 |
| 5124612 | Spark plug for internal-combustion engine | Hiroyuki Murai, Yasuyuki Sato | 1992-06-23 |
| 5056496 | Ignition system of multispark type | Seiji Morino, Yasuhito Takasu, Masato Somiya | 1991-10-15 |
| 4845400 | Spark plug for internal-combustion engine | Hiroyuki Murai, Yasuyuki Sato | 1989-07-04 |
| 4581558 | Spark plug for internal combustion engines having an alloy layer between the electrodes and tip ends | Yasuyuki Sato, Kanji Higuchi | 1986-04-08 |
| 4540910 | Spark plug for internal-combustion engine | Ryoji Kondo, Kanji Higuchi | 1985-09-10 |
| 4488081 | Ignition plug | Ryoji Kondo, Kanji Higuchi, Yasuyuki Sato, Minoru Nagai | 1984-12-11 |