[markem]

yeah, I haven't pulled the patent up yet but it seems to me that one could read the Bluetooth V4.0 specification on the patent as well as much of the low power sensor technology from TI. I don't know enough about the ink technology background to know if ink that is reactive to certain magnetic fields or frequencies is new or not. Remote unlocking of magnetically sealed doors is well known, however. If I get bored, I'll look up the patent history to see how the patent office queried the technology and what questions that they raised. That's always enlightening, if not entertaining.