[quote=jose]A trademark of the generic word "domain" or of "domain®" or of "xn--domain-nja"?[/quote]
register a TM of "domain®"
here is "The United States Patent and Trademark Office (USPTO)" :
[url]http://www.uspto.gov/teas/index.html[/url]
this link is also helpful:
http://www.copyright.gov/help/faq/
