Issued Patents All Time
Showing 26–50 of 50 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8253312 | Plasma jet spark plug | Yoshikuni Sato, Daisuke Nakano, Naofumi Yamamura, Daisuke Kasahara | 2012-08-28 |
| 8237342 | Plasma jet ignition plug and manufacturing method thereof | Naofumi Yamamura, Daisuke Nakano, Daisuke Kasahara | 2012-08-07 |
| 8203258 | Spark plug for low temperature environment | Tomoaki Kato | 2012-06-19 |
| 8196557 | Plasma-jet spark plug and ignition system | Yoshikuni Sato, Daisuke Nakano, Naofumi Yamamura, Daisuke Kasahara | 2012-06-12 |
| 8198790 | Plasma jet ignition plug | Yoshikuni Sato, Daisuke Nakano, Naofumi Yamamura, Daisuke Kasahara | 2012-06-12 |
| 8188641 | Spark plug | Katsutoshi Nakayama, Satoshi Nagasawa | 2012-05-29 |
| 8141532 | Spark plug | — | 2012-03-27 |
| 8120235 | Spark plug for internal combustion engine and method for manufacturing spark plug | Kenji Nunome, Hiroaki Kuki, Kazumasa Yoshida | 2012-02-21 |
| 8115372 | Spark plug for internal combustion engine and method of manufacturing the same | — | 2012-02-14 |
| 8087961 | Method of producing a spark plug that has a high dimensional accuracy in the spark gap | Tomoaki Kato | 2012-01-03 |
| 8013503 | Spark plug for internal combustion engine having ground electrode with thick, thin and stepped portion and method for producing the spark plug | Katsutoshi Nakayama, Satoshi Nagasawa | 2011-09-06 |
| 8013504 | Spark plug for internal combustion engine and method for producing the spark plug | Katsutoshi Nakayama, Satoshi Nagasawa | 2011-09-06 |
| 7924669 | Optical disk device and recording method | Takayuki Ono | 2011-04-12 |
| 7906894 | Spark plug for internal combustion engine | Tomoaki Kato, Katsutoshi Nakayama | 2011-03-15 |
| 7825572 | Spark plug | Katsutoshi Nakayama | 2010-11-02 |
| 7821186 | Spark plug having specific configuration of center electrode with respect to outer electrode | Katsutoshi Nakayama, Satoshi Nagasawa, Kazumasa Yoshida | 2010-10-26 |
| 7781949 | Spark plug | Kaori Kishimoto, Katsutoshi Nakayama, Yasushi Sakakura | 2010-08-24 |
| 7703428 | Spark plug and internal combustion engine in which the spark plug is disposed | Katsutoshi Nakayama | 2010-04-27 |
| 7593293 | Optical disk drive | — | 2009-09-22 |
| 7522486 | Optical disc apparatus | — | 2009-04-21 |
| 6628050 | Spark plug | Yoshihiro Matsubara | 2003-09-30 |
| 6618141 | Device for measurement of the spectral reflectance and process for measurement of the spectral reflectance | Masashi Shinbori, Kotaro Moroishi | 2003-09-09 |
| 6564786 | Apparatus and method for controlling ignition of an internal combustion engine | Yoshihiro Matsubara | 2003-05-20 |
| 6281682 | Sensor for detecting ignition current and ion current in ignition secondary circuit | Yoshihiro Matsubara | 2001-08-28 |
| D353246 | Electric iron | — | 1994-12-06 |