They were apparently designed with Ibanez and DiMarzio together. I have no idea what this means, but I can take a guess:
Ibanez employee, on phone: "hullo, is this one of the Dimarzio techs?"
Dimarzio tech: "yeah. What can I do for you?"
Ibanez employee: "to make a pickup I gotta wrap some wire around a magnet, right?"
DT: "yeah, but-"
DT: "He hung up. Wonder what that was about..."
All of the characters in the preceding drama are fictional. Any similarities to actual characters or pickups, living or dead, is purely coincidental.