ALEXANDRIA, Va., Dec. 2 -- United States Patent no. D1,103,809, issued on Dec. 2.
"Smoke alarm" was invented by Shixi You (Zhejiang, China), Haibo Zhang (Zhejiang, China), Yao Tan (Zhejiang, China) and Zhenxiao Ding (Zhejiang, China).
The patent was filed on July 12, 2024, under Application No. D/952,072.
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