Apple does not "work on" any technology, this could be the solution that will be put into a future iPhone. An iPhone is 90% OEM parts innovated by other companies like Synaptics and LG or Samsung. Apple is currently NOT inventing behind the glass fingerprint sensors, they are testing 3rd party products to see which one works best for them. So many people keep forgetting that Apple is closer to a Dell then an Intel in terms of "inventing" anything, they repackage parts into their own case designs and maybe customize a few parts and have a few in-house pieces. Its almost criminal how many people Apple has NOT inventing anything in their offices these days.