ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,447,370, issued on Oct. 21, was assigned to MACBO TECHNOLOGIES LLC (Denver).
"Hand grip strengthener with resistance level indication" was invented by Yiming Gao (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A hand grip strengthener includes two operation arms, a strength adjustment assembly, a scale display element having a plurality of resistance level scales, and an indication element, the strength adjustment assembly includes a spring element, a spring driving element, and an adjustment control element, when the adjustment control element is operated by the user, the spring driving element is driven to move, so as to drive the spri...