CPC Subgroup
H03H 9/54 comprising resonators of piezoelectric or electrostrictive material (comprising resonators using surface acoustic waves H03H9/64)
Full Title
Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators (electro-acoustic transducers such as loudspeakers, microphones or gramophone pick-ups H04R; piezoelectric, electrostrictive or magnetostrictive devices with mechanical input or output, e.g. actuators or sensors, H10N30/00, H10N35/00) > Filters (multiple-port electromechanical filters H03H9/70) > comprising resonators of piezoelectric or electrostrictive material (comprising resonators using surface acoustic waves H03H9/64)
5 direct subcodes
Child Classifications
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