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.