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PCE
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DIFF Subgroup
F01N 1/16

by using movable parts

Introduced: September 1968

Full Title

Silencing apparatus characterised by method of silencing > by using movable parts

CPC subdivides this area 2x more granularly than IPC with 4 additional codes.

4 codes are CPC-only extensions.

Child Classifications

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  • F01N 1/165 CPC only CPC only
  • F01N 1/166 CPC only CPC only
  • F01N 1/168 CPC only CPC only
  • F01N 1/18 having rotary movement IPC+CPC Available in IPC and CPC
  • F01N 1/20 having oscillating or vibrating movement IPC+CPC Available in IPC and CPC
  • F01N 1/22 the parts being resilient walls IPC+CPC Available in IPC and CPC