electroacoustic transducers; acoustic diaphragms namely acoustic membranes; graphene-based acoustic membrane

'acoust':3,6,11 'base':10 'diaphragm':4 'electroacoust':1 'graphen':9 'graphene-bas':8 'membran':7,12 'name':5 'transduc':2

acoustic building panels incorporating acoustic insulation, not of metal

'acoust':1,5 'build':2 'incorpor':4 'insul':6 'metal':9 'panel':3

acoustic insulation barrier panels; acoustical surface insulation; surface acoustic membrane used for surface soundproofing

'acoust':1,5,9 'barrier':3 'insul':2,7 'membran':10 'panel':4 'soundproof':14 'surfac':6,8,13 'use':11

GRAPHENEQ

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