Abstract: Dermal infusion devices and methods are provided. The device is configured to direct two different frequencies of oscillating motion (e.g., sonic and ultrasonic) towards the skin of a subject. The combination of the two different frequencies results in improved dermal infusion capabilities and can be used, for example, to effect transdermal delivery of a topical formulation.

Abstract: An automotive seat of the type allowing a child seat to be mounted thereon and including a center back portion, wherein a shape-retaining/locking element is provided to a lower region of the center back portion. The shape-retaining/locking element includes a rigid hollow support body; a cut-away portion defined in the support body; a female engagement element to which the child seat is lockably engaged, the female engagement element being exposed outwardly in such cut-away portion; and a cover element for covering the hollow support body and cut-away portion. The cover element includes a layer of hard synthetic resin material with a certain elasticity, such that it normally tends to retain its original shape generally conforming to a forwardly facing surface portion hollow support body. One end of the cover element may be releasably connected to the lower region of the hollow support body.