For trademark registration, it is recommended to do a good job of trademark search. Before submitting an application for registration, the applicant or his agent should make a search to see whether the trademark he is applying for is the same as or similar to the previously owned trademark.
To register a trademark, you can go to the National Trademark Office to register it, or you can entrust a trademark agent to register it.
You can also apply for registration online on Shewen.