DIFF Subgroup
H04R 23/02 Transducers using more than one principle simultaneously
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Transducers other than those covered by groups > Transducers using more than one principle simultaneously
CPC:
Transducers other than those covered by groups H04R9/00 - H04R21/00 > Transducers using more than one principle simultaneously
No child classifications to compare. This is a leaf node in both IPC and CPC.