Issued Patents 2004
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6814774 | Exhaust gas purification filter | Mikio Ishihara | 2004-11-09 |
| 6800107 | Exhaust gas purifying filter | Mikio Ishihara, Makoto Saito | 2004-10-05 |
| 6790248 | Exhaust gas purification filter | Mikio Ishihara, Hirohumi Yamashita | 2004-09-14 |
| 6764527 | Honeycomb structure constituted by main and sub honeycomb structures | Mikio Ishihara | 2004-07-20 |
| 6752969 | Honeycomb structural body | Keiji Ito | 2004-06-22 |
| 6696131 | Ceramic honeycomb structure | Takeshi Ueda | 2004-02-24 |