encoded magnet polarity

[StarryNight]

I don't think these guys are going to build pickups but if they did - whoa!
YouTube - Innovative Magnetics Research in Huntsville

[big_teee]

I watched the video.
I'm very impressed.
It looks like the Usefulness of Magnets is Endless!!!
Terry

[David King]

I don't really see much here that's new, there have been magnetic chucks, clutches, keyed padlocks etc probably for generations. What they don't talk about is how they magnetize a pair of single magnets to full strength with opposing fields so close to each other without demagnetizing adjacent fields. That's tricky however I don't see any immediate applications for pickups. Hopefully someone else will.