DIFF Main Group
H04R 19/00 Electrostatic transducers
Introduced: September 1968
Of 5 combined children, 4 exist in both systems.
1 codes are CPC-only extensions.
3 shared codes have differing titles between IPC and CPC.
Child Classifications
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- H04R 19/06 Gramophone pick-ups using a stylus; Recorders using a stylus (H04R19/01 takes precedence) IPC+CPC Available in IPC and CPC