DIFF Main Group
H04R 17/00 Piezoelectric transducers; Electrostrictive transducers (piezoelectric or electrostrictive elements in general H10N30/00; details of piezoelectric or electrostrictive motors, generators or positioners )
Introduced: September 1968
Title
Titles differ between systems:
IPC: Piezoelectric transducers; Electrostrictive transducers
CPC: Piezoelectric transducers; Electrostrictive transducers (piezoelectric or electrostrictive elements in general H10N30/00; details of piezoelectric or electrostrictive motors, generators or positioners )
Full Title
Full titles differ between systems:
IPC:
Piezoelectric transducers; Electrostrictive transducers
CPC:
Piezoelectric transducers; Electrostrictive transducers (piezoelectric or electrostrictive elements in general H10N30/00; details of piezoelectric or electrostrictive motors, generators or positioners )
Of 4 combined children, 3 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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- H04R 17/04 Gramophone pick-ups using a stylus; Recorders using a stylus IPC+CPC Available in IPC and CPC
- H04R 17/10 Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency IPC+CPC Available in IPC and CPC