ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,390,921, issued on Aug. 19, was assigned to ERSSON Co. LTD. (Taichung, Taiwan).
"Expandable tool box assembly" was invented by Ming-Hsien Liu (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A tool box assembly has at least one tool box, and each tool box has a container, at least one first assembling structure, at least one second assembling structure, and at least one drawer. The container of each tool box has a base and a surrounding wall erectly disposed at the base. Each second assembling structure is configured to engage with each first assembling structure. The at least one drawer of each tool box is disposed within the container ...