Loudspeaker having a voice coil and a piezoelectric feedback...

Details Loudspeaker having a voice coil and a piezoelectric feedback... Loudspeaker having a voice coil and a piezoelectric feedback...

H - Electricity

04

R

349/66

H04R 23/02 (2006.01) H04R 3/00 (2006.01) H04R 3/08 (2006.01)

Patent

CA 1003554

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