Mahlon Pitney, Hanover Star Milling Company v…
“ Into whatever markets the use of a trademark has extended, or its meaning has become known, there will the manufacturer or trader whose trade is pirated by an infringing use be entitled to protection and redress. But this is not to say that the proprietor of a trademark, good in the markets where it has been employed, can monopolize markets that his trade has never reached, and where the mark signifies not his goods, but those of another. ”
