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Trademarking is only for a brand name, like Pepsi, Kleenex, or xerox. You notice it's not patented. It's funny the devices that have patent numbers are fakes! (look this up if you want, it comes...

I'm not seeing the added "trademarked" value in this, just a whole lot of marketing. We work out with all sorts of resistance cords with handles and sport cords at my gym.