ALEXANDRIA, Va., March 3 -- United States Patent no. D1,115,560, issued on March 3, was assigned to SHENZHEN SMARTSAFE TECH Co. LTD. (Shenzhen, China).
"Calibration device" was invented by Wei Zhan (Shenzhen, China), Shaoli Gu (Shenzhen, China) and Qingwei Wang (Shenzhen, China).
The patent was filed on June 21, 2024, under Application No. D/948,547.
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