US Patent 11864645 Interlocking attachment systems

An interface portion having at least one locking aperture defined by a top wall and an opposing bottom wall and a pair of opposing, substantially equal length, parallel side walls, and wherein an upturned corner portion is defined between the top wall and each of the parallel side walls; and at least one attachment element extends from the interface portion, having attachment element notches formed in opposing side portions defining a neck portion, wherein the attachment element notches define barb portions, wherein at least a portion of the at least one attachment element is positionable through the locking aperture such that the neck portion is positionable within the locking aperture, and wherein if a withdrawing force is applied to the attachment element a portion of the barb portions engages a portion of at least one of the upturned corner portions to aid in resisting the withdrawing force.