Four gates, four definitions of taken
Getting past one says nothing about the other three. One pass reads all four.
The check everyone runs misses this
A search box returns nothing for a name one letter and one sound away.
Illustrations of the mechanism, not case studies. The US register holds none of these six names.
Or start from names already checked
Give it a name you like. It generates candidates in the same territory, runs every one through all four gates, and hands you only the survivors.
You find out last
A name fails after the logo, the domain, the build, the launch post. At that point it is not a rename. It is a rebrand.
What it catches, measured
Fifteen known collisions, run against the live register. Five cannot be caught by anything, so ten is a perfect score here.
Screen a name
One name, free, no account.
Screen a nameThis is a screening tool, not legal advice. Before you commit to a name, have a trademark attorney run a full search.