ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,730,036, issued on Sept. 8, was assigned to Mingyang Windeco Technology Corp. (Zhengzhou, China).
"Cordless spring-system curtain inspection device" was invented by Nianqing Zhang (Zhengzhou, China), Pengyu Yang (Zhengzhou, China) and Yongqing Kang (Zhengzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A cordless spring-system curtain inspection device, comprising a test stand a curtain-opening and -closing drive mechanism disposed on the test stand, wherein the curtain-opening and -closing drive mechanism comprises a clamping mechanism configured to clamp a lower beam of a curtain and a lower-beam lifting drive mechanism configured to drive t...