Abstract: A system that secures an upper door of a UTV or other vehicle to the vehicle and enables the ready removal and storage of the upper door from the vehicle employs magnets. A first set of magnets is carried by the upper door. A second set of magnets, which is attracted to the first set of magnets, is carried directly or indirectly by the vehicle, such as by a filler panel secured to the vehicle. Methods of deploying and securing an upper door in place and at least partially removing the upper door are also disclosed.

Abstract: A rock guard comprises a flexible sheet of mesh selectively wound around a spool to be selectively retracted and deployed in front of a trailer or its contents, such as a boat. A pair of brackets mount to a rail of trailer and carry the spool. A top distal edge of the sheet can be flexible and arcuate in the deployed configuration to form an arc matching a gunwale of the boat.

Abstract: Products and methods are provided for additive manufacturing of products in a collapsed state for post printing expansion in preparation for use in their intended application. A product includes interconnecting members configured for forming by printing in a collapsed state, with joints between the interconnecting members configured for relative movement of the interconnected members from the collapsed state to an expanded state. The interconnecting members define a larger package size in the expanded state than in the collapsed state. The joints are freely moveable in the collapsed state and are locked in place in the expanded state.

Abstract: A retractable stone guard for the front of a towed vehicle. The guard includes a sheet of durable shape-returning material which may be stretched across the front of the vehicle during road travel. A hinged cover conceals the sheet when in its retracted position.