ALEXANDRIA, Va., July 15 -- United States Patent no. 12,663,337, issued on June 23, was assigned to AAC Optics (Suzhou) Co. Ltd. (Suzhou, China).
"Lens loosening test device and lens loosening test method" was invented by Nan Qiao (Suzhou, China), Haopeng Zhou (Suzhou, China) and Dasong Ge (Suzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The lens loosening test device includes a frame, a testing module, and a testing picture card. The testing module includes a base, a rotating drive component, a rotating bracket connected to and driven by the rotating drive component, a knocking component fixed to the rotating bracket, an imaging component, and a fixing component. The fixing component is configu...