ALEXANDRIA, Va., March 17 -- United States Patent no. D1,118,574, issued on March 17.
"Sound muffling microphone mask" was invented by Min Yang (Shenzhen, China), Shuyu Chen (Shenzhen, China), Mengyao Xie (Shenzhen, China) and Xiaonan Zhang (Shenzhen, China).
The patent was filed on April 7, 2024, under Application No. D/521,407.
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