I think the z-man chatterbait is patented too. However, I have an In-Fisherman book titled "Bass" that has a picture of the freaking lure. The book was published in 1986 and they talk about the lure like it was from the 70s. Point being, you can patent anything if you have the $... even if it was already invented.
As for the @-rig, I was in favor of the "little guy" making it and I can understand them wanting to protect their name. But really, they need to attack the companies that ARE stealing the rig for significant financial gain. Heck, I recall Tackle Warehouse have one that was boasting about Paul Elias victory with the @-rig on the same freakin' page that they were selling the knock off. But I guess attacking people (aka the consumer) that are FANS of their lure seems to be easier. BTW, I'm patenting the universal lure as of right now. It has every action known and to be known to man and is made from everything, some things, and/or absolutely nothing all at the same time. It has immeasurable dimensions and the ability to get around every loophole in any fishing regulation. I call it, the MASTER-BAIT-------r! (TM!)