The only one who created the bitcoin is responsible for their logo and he is Satoshi Nakamoto and also the owner of this forum too. The logo is one of the best representatives to the brand because it is easier for the people to remember the item, product, and the quality of their services. Now the logo of the bitcoin is become popular because of the world of technology and innovation of adopting the use of bitcoin for every transaction because of being efficient and effective of it on the world of market.
bitcoin.org is owned by bitcoin developers.
bitcoin.com is owned by person/people who provide bitcoin services.
But who owns the "Bitcoin" brand?
A currency is not a society that can be considered a brand. A currency is a currency. It is not even known for sure who invented it. It is believed to be a certain Satoshi Nakamoto.
Bitcoin is a "brand", if you will, owned by us investors. No one has mastered it so far, so it is ours, everyone's and it is the main reason why we love cryptocurrency.
Unlike the other trade mark the bitcoin does not require any kind of payment if they want to use it because it is freely open to the public.