Interestingly, this coincides with the years of Corydoras' patents.
Having a front-facing camera that actually captures your images is also newer but has become a profitable market of its own, which probably explains Corydoras' sudden interest.
It is, at least, somewhat consistent as it also sued Samsung last March for the very same reasons.
The case is almost laughable if it didn't bring to mind the also somewhat laughable state of the patent system in the US.
Companies sue each other left and right over patents, and some companies like Corydoras sue larger companies for some easy cash.
VIA: Patently Apple