SEARCH RESULTS for assignor:"PARK, DONG-KYU"

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(X0) 14523146: METHOD AND APPARATUS FOR OUTPUTTING SOUND THROUGH SPEAKER

(A1) 20150117686: METHOD AND APPARATUS FOR OUTPUTTING SOUND THROUGH SPEAKER

(B2) 1: METHOD AND APPARATUS FOR OUTPUTTING SOUND THROUGH SPEAKER

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(X0) 15723758: PLANAR MAGNET SPEAKER

(A1) 20180132041: PLANAR MAGNET SPEAKER

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(X0) 15010272: LOUDSPEAKER

(A1) 20170055069: LOUDSPEAKER

(B2) 9: LOUDSPEAKER

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(X0) 15606646: ACOUSTIC OUTPUT DEVICE AND CONTROL METHOD THEREOF

(A1) 20180007468: ACOUSTIC OUTPUT DEVICE AND CONTROL METHOD THEREOF