> Once you have established the trademark, you can prevent others from using that name, even if they have been using it for a long time. You can prevent others

> Once you have established the trademark, you can prevent others from using that name, even if they have been using it for a long time. You can prevent others from using it in the field the trademark was registered for to identify a product or service not approved by the trademark holder. Most statements of trademark law being ridiculous for allowing people to "own" common words hinge on ignorance of these details.