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Ping-yu Lee
Taoyuan City
TW
3 patents
3 Patents
US12581243
2026
Vibration Damping Loudspeaker
FORTUNE GRAND TECHNOLOGY Inc.
0 cites
US12160725
2024
Double-sided Loudspeaker
FORTUNE GRAND TECHNOLOGY Inc.
0 cites
US11632609
2023
Thin Double-sided Vibrating Speaker
FORTUNE GRAND TECHNOLOGY Inc.
0 cites