CPC Main Group
F01N 1/00 Silencing apparatus characterised by method of silencing
7 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- F01N 1/02 by using resonance
- F01N 1/06 by using interference effect
- F01N 1/08 by reducing exhaust energy by throttling or whirling
- F01N 1/14 by adding air to exhaust gases
- F01N 1/16 by using movable parts
- F01N 1/24 by using sound-absorbing materials (F01N1/04, F01N1/06, F01N1/10, F01N1/14, F01N1/16 take precedence)