This seems to be a bit of a grey area so hopefully someone can clear this up. When something is Trademarked for US does it have Trademark Rights for the World. Seems a daft question but after reading into this No, a U.S. trademark registration will not protect your trademark in a foreign country. Trademarks are territorial and must be filed in each country where protection is sought. However, if you are a qualified owner of trademark application pending before the U.S. Patent and Trademark Office (USPTO), or of a registration issued by the USPTO, you may seek registration in any of the countries that have joined the Madrid Protocol source- stopfakes(dot)gov So the following questions. 1.Does that mean application to trademark xy or z can still be applied for in there non-trademarked your country.? 2.Does this effect domain names that are tradmarked in that country for example (Trademark registered US ) ABABA.com then ABABABA.co.uk (no -insert your country- trademark). 3.What would one do if approached threateningly about usage of trademark if they had no jurisdiction. 4.Has anyone had a similar issue maybe you can share (if the court case has ended of-course) :D Cheers Chris Short Edit - The Madrid Protocol - Surely this would be the best place to check for trade marks if your country's a member and could potentially be affected by another countries member.