ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,454,297, issued on Oct. 28.
"Enhanced mechanism for hand trucks" was invented by Frank Guerrero Riojas (Saginaw, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "Devices, systems, and methods are provided for helping hand trucks lift heavy objects. A device for attaching to hand trucks and lifting objects may include a pallet portion for lifting weight, the pallet portion having a bottom portion facing the ground and a top portion, wherein weight is arranged on the top portion; an angle maintaining portion attached to the bottom portion, wherein when the angle maintaining portion is touching the ground, the pallet portion is positioned at an angle g...