Regular viewers please switch off ;-)
"is this search of any value and does it have any connections to trademarks registered outside the US?"
Sorry kvarnsten.
The great and mighty UN WIPO themselves will not guarantee that your domain is safe - even if you check all their sources:
"any searches using the links provided on this site will not be sufficient to determine definitively whether or not the domain name is infringing."
http://ecommerce.wipo.int/databases/trademark/index.html
I am certain that the people within UN WIPO are corupt.
They KNOW that virtually every word is registered trademarked and confusion can arise with domain names.
They KNOW that the only way to avoid confusion with ordinary domain names is to have some sort of identifier to identify them - to replace registered trademark symbol î - like a protected .reg TLD.
They wish to give over the DNS to their customers - the registered trademark holders.
Indeed - you can legally use any word, words or initials to start a new business without registering a trademark - providing you are not passing off, of course. Take for example the word 'apple'. It is legally used by thousands of businesses - large and small all over the world. Indeed, it is impossible that they all register themselves as trademarks - they are bound to conflict with many others, being confusingly similar. In my local phone book alone, there are at least five using this word - two garages (seems not connected), a car centre, fruit growers and a decorating firm.
Solution?
apple.com could resolve to apple.computer.us.reg
Who else could it be?
This can be also used directly (as directory) and acts as certificate of authentication.
By the way, there are 314 Records on USPTO using the word "Empire". Those that use it for any form of gambling will likely have your nuts.
kvarnsten - do not forget to check the word on two hundred other countries