When Elon Musk renamed Twitter to X, it was presented as a step forward. A federal court in Delaware has now ruled on what it actually meant legally: the company kept the name Twitter, but appears to have left the word tweet and the bird logo behind.

The defendant is a Virginia startup called Operation Bluebird, which appeared as Twitter.now and announced a social network of its own. Judge Colm F. Connolly issued a split decision: he granted a preliminary injunction on eight trademarks connected to Twitter, but refused it for the word tweet and the bird logo. The reasoning states that the startup is "likely to succeed in proving" that X discontinued genuine use of those two marks and does not intend to resume it.

The startup reacted within days - the website is now called Tweet.app and is open to users.

It is worth saying plainly what this is. The company does not hide that its aim is to pick up what Musk dropped - that is stated literally on the homepage. It is run by two lawyers, founder Michael Peroff and Steven Coates, who was previously a trademark lawyer at Twitter itself. Two lawyers who know the procedure from the inside are claiming marks of known value. The story about wanting to build a new social network is a nice one, but it is not the one that explains the team.

That does not mean they have no audience. Before launch, over 172,000 people claimed a username on the site - with a name reservation costing 20 dollars (around 17 euros), which covers the legal bills rather comfortably. People did not pay for a product they had seen. They paid for a name they remember.

Coates summed the case up in a sentence better than any legal filing: "They kept the word. They let the bird go and they let tweet go." He added that the word survived three years while a company tried to replace it, because the public refused to stop using it.

And there is the real lesson, which is not about Musk. A trademark is not yours because you paid for it - it is yours while you use it. A company worth tens of billions dropped its own noun through inattention, and now has to prove in court that it still needs it. The case is not over and will continue in order to establish what remains of the old marks at X.

How many brand owners have ever asked themselves what exactly they own - before somebody else explains it to them through a lawsuit?