That's trade mark laws for you. If you don't try and protect your trade mark at every opportunity it can be stripped from you and every Tom, Dick, and Harry can put out whatever they want with your name/term.

I get it, but still, that's the law for you. The most of us will still say Velcro because it's what we all know it as.

Related: https://en.wikipedia.org/wiki/List_of_generic_and_genericize...