CPC Subgroup
G10K 9/12 electrically operated
Full Title
Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers (loudspeakers or like acoustic electromechanical transducers H04R) > electrically operated
5 direct subcodes
Child Classifications
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- G10K 9/122 using piezoelectric driving means
- G10K 9/128 using magnetostrictive driving means
- G10K 9/13 using electromagnetic driving means
- G10K 9/16 with means for generating current by muscle power