Issued Patents All Time
Showing 26–50 of 55 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8749125 | Spark plug | Katsuya Takaoka, Hironori Uegaki, Hirokazu Kurono | 2014-06-10 |
| 8710725 | Spark plug | Haruki Yoshida | 2014-04-29 |
| 8672722 | Spark plug manufacturing method | Kazumichi Hirose, Hirokazu Kurono | 2014-03-18 |
| 8653725 | Spark plug for internal-combustion engine | Haruki Yoshida | 2014-02-18 |
| 8564184 | Spark plug and process for producing spark plug | Hirokazu Kurono, Katsuya Takaoka, Hiroki Takeuchi, Kuniharu Tanaka, Takeshi Mitsuoka | 2013-10-22 |
| 8564183 | Spark plug and method for manufacturing spark plug | Akira Suzuki, Katsuya Takaoka, Hirokazu Kurono | 2013-10-22 |
| 8550865 | Spark plug manufacturing method | Hironori Uegaki | 2013-10-08 |
| 8539921 | Spark plug | Makoto Kuribayashi, Hirokazu Kurono, Tomoaki Kato | 2013-09-24 |
| 8482187 | Spark plug and process for producing spark plug | Katsuya Takaoka, Hironori Uegaki, Hirokazu Kurono | 2013-07-09 |
| 8469758 | Insulator for spark plug, and method for manufacturing spark plug | Hirokazu Kurono | 2013-06-25 |
| 8395307 | Spark plug for preventing accumulation of carbon on an insulator | Akira Suzuki, Tomoaki Kato, Mamoru Musasa | 2013-03-12 |
| 8390183 | Spark plug and method for manufacturing spark plug | Hirokazu Kurono, Hiroki Takeuchi, Takeshi Mitsuoka, Kuniharu Tanaka, Kazunari Miyata +1 more | 2013-03-05 |
| 8278809 | Spark plug with alumina-based insulator | Hirokazu Kurono, Katsuya Takaoka, Hiroki Takeuchi, Kuniharu Tanaka, Takeshi Mitsuoka | 2012-10-02 |
| 8242672 | Spark plug having a fixation assisting member for the insulator | Makoto Kuribayashi, Keita Nakagawa | 2012-08-14 |
| 8183754 | Alumina-based sintered body for spark plug and method of manufacturing the same, and spark plug and method of manufacturing the same | Makoto Kuribayashi, Hironori Uegaki, Hirokazu Kurono | 2012-05-22 |
| 8148883 | Spark plug used for an internal-combustion engine and a method for manufacturing the same | Hiroyuki Tanabe, Takamitu Mizuno, Hiromi Otuka | 2012-04-03 |
| 8128446 | Method for manufacturing a spark plug insulator including steps for forming a through hole therein | Takamitsu Mizuno, Shinichi Sakurai | 2012-03-06 |
| 8093791 | Spark plug having particular insulator | Hirokazu Kurono, Hiroki Takeuchi, Takeshi Mitsuoka, Kuniharu Tanaka, Katsuya Takaoka | 2012-01-10 |
| 8013617 | Test method and apparatus for spark plug ceramic insulator | Hiroyuki Tanabe | 2011-09-06 |
| 7938706 | Deflection inspecting device for spark plug insulator, deflection inspecting method for spark plug insulator, and manufacturing method for spark plug insulator | Hirokazu Kurono | 2011-05-10 |
| 7906893 | Spark plug of internal combustion engine having glaze layers on the spark plug | Mai Moribe, Akira Suzuki | 2011-03-15 |
| 7808250 | Test method and apparatus for spark plug insulator | Hirokazu Kurono, Tomoaki Kato | 2010-10-05 |
| 7710006 | Spark plug | Jiro Kyuno | 2010-05-04 |
| 7402941 | Spark plug | Tsutomu Shibata | 2008-07-22 |
| 7365480 | Spark plug | Tsutomu Shibata | 2008-04-29 |