ALEXANDRIA, Va., July 16 -- United States Patent no. 12,357,487, issued on July 15, was assigned to The Government of the United States, as represented by the Secretary of the Army (Washington).

"Spring engagement and disengagement during gait cycle" was invented by Nathan Sharpes (Abingdon, Md.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Various embodiments that pertain to a joint-based spring configuration. The joint-based spring configuration can be employed during a gait cycle. A gait cycle can comprise a driven phase and a resetting phase. The driven phase can be when a foot is on the ground and the resetting phase can be when the foot is off the ground and moving to the next time the foot is on the ...