Brown Coleman has been in business selling men's jean pants for five years now. His T-shirts are called "Browns" and have the gold and orange logo design BC on the left front breast area. The entire public knows Brown's Jean by the name Browns and the logo BC. Brown has just heard that another company is contemplating making Jean pants like his own using a logo in Gold only that it reads BC and intends to call them "BCs."

Applying the relevant legal concept(s) and principle(s) explain 3 legal issues and concepts engaged by the question.