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US Patent 11310931 Waterproof membrane, waterproof member including same, and electronic device

Patent 11310931 was granted and assigned to Nitto Denko on April, 2022 by the United States Patent and Trademark Office.

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A waterproof membrane of the present disclosure has an insertion loss of 5.0 dB or less for sound with a frequency of 1 kHz, and an insertion loss of 5.0 dB or less for sound with a frequency of 10 kHz when a permeation region for sound of the waterproof membrane has an area of 1.3 mm

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