ALEXANDRIA, Va., July 15 -- United States Patent no. 12,661,550, issued on June 23, was assigned to MACBO TECHNOLOGIES LLC (Denver).
"Hand grip strengthener" was invented by Yiming Gao (Shenzhen City, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A hand grip strengthener includes a first operation arm, a second operation arm, a strength adjustment assembly including a spring element, a spring driving element, and an adjustment control element, wherein the spring element is arranged to generate a resistance force to the relative movement between the first operation arm and the second operation arm, wherein when the adjustment control element is operated by the user, the spring driving element is driven...