Expiry of the Sony/Philips patents on CD has left all companies (including Philips and Sony) free to tinker with the standard system. Recently filed patents show just how far they want to go, even though the tinkering may make some discs incompatible with some players.Warner Bros admits in new patent filing that enterprising shoplifters are now defeating conventional anti-theft packaging by slicing open the boxes and shaking discs free.
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