ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,728,504, issued on Sept. 8.
"Self-locking and adjustable dual ratchet clamping apparatus" was invented by Geng Yan (Calgary, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "The self-locking and adjustable dual ratchet clamping apparatus comprises a frame which is either a single rail or a dual rail structure having an integral ratchet rack on a side, a fixed jaw at one end of the frame, a movable jaw mounted on the frame and moves along the rail structure relative to the fixed jaw, a first ratchet system including a rotatable ratchet trigger pivotally connected to the movable jaw and is engaged with a locking pawl supported by the movable jaw to f...