Is My US Trademark Registration Valid Outside the US? Taking the important step to protect your company's brand or brands by filing a US trademark application to attain federal registration is a great strategy.  However, once you have attained your US trademark, what happens when your business grows, and you start using your trademarks to sell the same products or services in another country?  That is a common question that our firm is asked all the time.  With the advent of the internet and e-commerce, the world is a smaller and interconnected place.  However, trademark registration is still very much linked to the jurisdiction of the registration.  This article will try to answer the question and provide the details to help business owners know their options when it comes to expansion to a new jurisdiction or country.