Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7581998 | Method for regulating aground electrode position in spark plug | Shigeo Fujita, Masahiro Enuma | 2009-09-01 |
| 7483562 | Method of detecting protrudent adhered matters and method of making spark plug using the same | Masato Ito | 2009-01-27 |
| 7112112 | Method and apparatus for making a spark plug with a predetermined spark gap | Shigeo Fujita | 2006-09-26 |
| 6695663 | Method for manufacturing spark plug and apparatus for carrying out the same | Masato Ito | 2004-02-24 |
| 6592418 | Method for manufacturing spark plug and apparatus for carrying out the same | Masato Ito | 2003-07-15 |