@choyer@fediversenews I should also add, that if the trademark is registered under "computer software and services", that means it's still available for other categories. You could create a detergent called Firefish and legally register it, because it falls under another category (assuming no one did that before you).
Now, you might tell me that I'm wrong about that, too. To which I will only say, Linux (the kernel) is a registered trademark, but also only for a certain category, which is why this is possible: https://www.roeschswiss.com/en/11_linux
And yes, it's a real product, I've seen it in grocery stores. And yes, they have a registered trademark on Linux (for another category).