Amazon CEO Jeff Bezos and Amazon VP Gregory Hart have been awarded a patent that outlines a number of innovative solutions to protect portable devices from hard impacts. One of the methods involves a deployable airbag that is activated when the device's sensors detect its fall from heights.

(Image Source: Geek Wire)
Another idea details the use of jets of compressed gas to orientate the dropped device so that it can be cushioned by a deployed airbag or springs. Details of the patent can be viewed here; the different solutions highlighted in this patent appear to be figments of an imaginative mind and may never see their mainstream usage in portable devices.
(Source: United States Patent and Trademark Office via Geek Wire)