TREA

Plural layers of different materials

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  • CPC
  • G10K11/168
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Parent Industries

GPHYSICS G10Musical instruments G10KSOUND-PRODUCING DEVICES ACOUSTICS NOT OTHERWISE PROVIDED FOR G10K11/00Methods or devices for transmitting, conducting or directing sound in general Methods or devices for protecting against, or for damping, noise or other acoustic waves in general

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G10K11/168Plural layers of different materials
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