ALEXANDRIA, Va., May 12 -- United States Patent no. 12,623,821, issued on May 12, was assigned to Hebei Fenger Intelligent Technology Co. Ltd (Shijiazhuang, China).
"Box" was invented by Jianzhong Zhang (Handan, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention discloses a box, comprising: a box body; a box cover, wherein the box cover is covered at an opening of the box body, a limiting cylinder is formed on the bottom end of the box cover near an outer edge, and the bottom end of the box cover is provided with an annular clamping groove located at the outer side of the limiting cylinder; an elastic sealing ring which comprises: a top sealing ring, an inserting flange; a middle seal...