TMview (https://www.tmdn.org/tmview/welcome) to the rescue!

The word "maemo" is trademarked *as a word*, i.e. not maemo.org, not icon, not logo, no nothing except for the word.

The question still remains about who owns the "maemo.org" logo we all see on our screen right now. I have the feeling that even if someone uses the logo without explicit authorisation nobody (i.e. owner) is going to come and sue him, unless it's a company the name of which I dare not mention for various reasons, which I can also not speak of.