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Your search returned 324 patents.
( 60/289 in Current US Classification ) |
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| 1 2 3 4 |
| Patent ID | Title | Date Filed |
| 6477831 | Combatting air pollution
| July 9, 1999 |
| 6463732 | Method and arrangement for checking catalytic converter heating measures in an internal combustion engine
| June 4, 2001 |
| 1 2 3 4 |
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