Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6744554 | Wavelength conversion apparatus | Shiro Shichijyo | 2004-06-01 |
| 6711932 | Abnormality diagnosis system and method for oxygen sensor | Yasushi Iwazaki, Takashi Ogawa | 2004-03-30 |