Issued Patents All Time
Showing 1–25 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9039879 | Gas sensor and method of manufacturing thereof | — | 2015-05-26 |
| 8523624 | Spark plug for internal combustion engine and manufacturing method thereof | Ken Hanashi, Kenka Tsubota | 2013-09-03 |
| 8449742 | Gas sensor and method of manufacturing same | Kaneo Buma, Masato Ozawa, Hirofumi Noda, Kouichi Hirano | 2013-05-28 |
| 8258686 | Spark plug for internal combustion engine | Ken Hanashi, Kenka Tsubota | 2012-09-04 |
| 7554253 | Spark plug with increased durability and carbon fouling resistance | Taiji Koyama | 2009-06-30 |
| 7484402 | Gas sensor | — | 2009-02-03 |
| 7298070 | Compact structure of spark plug designed to ensure desired heat range | — | 2007-11-20 |
| 7282844 | High performance, long-life spark plug | Shinichi Okabe | 2007-10-16 |
| 7267116 | Spark plug and ignition apparatus using same | Tetsuya Miwa, Tohru Yoshinaga, Shinichi Okabe | 2007-09-11 |
| 7250711 | Spark plug with increased durability and carbon fouling resistance | Taiji Koyama | 2007-07-31 |
| 7230369 | Spark plug | — | 2007-06-12 |
| 7224109 | Spark plug | — | 2007-05-29 |
| 7183702 | Spark plug with high insulation properties and high capability to ignite air-fuel mixture | Shinichi Okabe | 2007-02-27 |
| 7176608 | Spark plug | — | 2007-02-13 |
| 7122948 | Spark plug having enhanced capability to ignite air-fuel mixture | Shinichi Okabe | 2006-10-17 |
| 7086363 | Spark plug and ignition apparatus using same | Tetsuya Miwa, Tohru Yoshinaga, Shinichi Okabe | 2006-08-08 |
| 6885137 | Spark plug and its manufacturing method | Tsunetoshi Goto | 2005-04-26 |
| 6885135 | Spark plug and its manufacturing method | Tsunenobu Hori | 2005-04-26 |
| 6853116 | Structure of spark plug designed to provide higher durability and ignitability of fuel | Tsunenobu Hori | 2005-02-08 |
| 6844662 | Spark plug and ignition apparatus | Hitoshi Morita, Shinichi Okabe, Takehiko Kato, Hiroshi Yorita, Tetsuya Miwa | 2005-01-18 |
| 6831397 | Spark plug and a method of producing the same | Tsunenobu Hori | 2004-12-14 |
| 6819033 | Spark plug and method of manufacturing same | Masayuki Tamura | 2004-11-16 |
| 6794804 | Production method of spark plug designed to provide high temperature oxidation resistance and weld strength and spark plug produced thereby | Tsunenobu Hori | 2004-09-21 |
| 6724132 | Spark plug for an engine for a cogeneration system | — | 2004-04-20 |
| 6700317 | Spark plug for an internal combustion engine and manufacturing method of the same | Kouzou Takamura | 2004-03-02 |