4. Acoustics
  5. Sound-modifying means
  6. Intensifying horn

Peter S. Y. Yeh

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Baseball bat having the functions of resonators and microphones

Acoustics – Sound-modifying means – Intensifying horn
Patent

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Sport paddle providing the effects of sound and light

Amusement devices: games – Aerial projectile game; game element or accessory therefor... – Target
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Profile ID: LFUS-PAI-P-1321675

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