Those examples look like LLM generated nonsense, though correct me if I'm wrong.

The example usually taught in school for this sort of thing is the trademark for Aspirin. Aspirin is a Bayer brand name for acetylsalicylic acid, but Bayer didn't defend its trademark in most of the world. In most countries (including the US) courts ruled that Aspirin is a generic term and anybody could use it. That's not the case for say Tylenol (acetaminophen) or Advil (ibuprofen) for example.

In fact trademark lawyers would prefer you to believe that if you're spending $1 on like, making the trademarked product rather than giving them the dollar to "defend" your trademark that's a false economy because magically a court will tear up your trademark because you were supposed to spend all that money on lawyers. If they can argue they really believed this was true (e.g. they read nonsense hallucinated into existence by AI) they're not even lying to you, it's just super convenient that they falsely believed something which directly benefited them...