US Patent 8112894 Retractable pocket clip for knife

A folding knife with a retractable clip is disclosed. The folding knife comprises at least two rigid plates housing at least one knife blade and the retractable clip. The retractable clip is slidably mounted between the two rigid plates and traverses a path between a retracted position and an extended position defined by a guide slot in a base portion of the clip. A guide pin intermediate the slot and between the plates limits the translational movement of the retractable clip such that its extension is optimal for affixing it onto clothing by means of an elongated member attached to the base portion, and its retraction within the housing space renders a smooth facing to the knife.