Abstract: An end-lock joinery system allows the formation of one or more elongated members configured to lock end portions with each other. An elongated member can have an end portion that includes, but is not limited to, a protrusion, a shoulder, and a recess, the protrusion and recess each having a width that smoothly tapers from a wider portion to a narrower portion. Various embodiments of the end-lock joinery system can provide different modular configurations to join elongated members and present curved surfaces. The end-lock joinery system can be formed via various methods, including, but not limited to, using a computer numerical control (CNC) machine.

Abstract: A flexible neck cover for attachment to the lower back rim or band of a hat or cap is formed from a conical surface of revolution to provide an improved shape which allows the cover to flow or drape over a person's shoulders when wearing the neck cover. The neck cover is provided with respective upper and lower concave and convex arcuate edges and opposed, preferably straight or convex curved side edges. The neck cover may include decorative indicia thereon, including advertising information or the like, and water dispensing vials or a soaker “rope” secured thereto to provide an evaporative cooling effect for the wearer.