ALEXANDRIA, Va., July 21 -- United States Patent no. 12,685,891, issued on July 21.

"Hand weight" was invented by Peter Winston Hamady (Silver Spring, Md.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A hand weight includes a chassis including a handle portion configured to be grasped by a user such that a forearm of the user extends along an axis, and a flexible element attached to the chassis. The hand weight can be configured to receive a movable mass, and the flexible element can be configured to at least partially support the movable mass such that the movable mass forms at least part of a sprung mass of a hand weight assembly including the hand weight and the movable mass, the sprung mass configured t...