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PCE
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DIFF Subgroup
H04R 1/12

Sanitary or hygienic devices for mouthpieces or earpieces, e.g. for protecting against infection

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Details of transducers > Sanitary or hygienic devices for mouthpieces or earpieces, e.g. for protecting against infection

CPC:

Details of transducers, > Sanitary or hygienic devices for mouthpieces or earpieces, e.g. for protecting against infection

No child classifications to compare. This is a leaf node in both IPC and CPC.