In the case of Hamilton-Brown Shoe Co. v. Wolf Brothers & Co., the U.S Supreme Court in 1915 ruled on a trademark dispute between two shoe companies. The plaintiff, Hamilton-Brown Shoe Company, claimed that Wolf Brothers & Co had infringed upon their trademark by using a similar name and logo for its shoes, causing confusion among customers and damaging their business reputation. However, the court found no evidence to support these claims as there was no proof of actual deception or confusion caused by the defendant's use of its own mark. Furthermore, it was noted that both trademarks were registered under different classes - one for boots and shoes while another for clothing - which further diminished any potential likelihood of confusion among consumers about source or origin due to similarity in marks used by both parties involved in this lawsuit.

In the dissenting opinion for Hamilton-Brown Shoe Co. v. Wolf Brothers & Co., Justice Holmes disagreed with the majority's decision that a trademark could be protected even if it was not used in commerce between states or with foreign nations, as long as it had been registered under the Trademark Act of 1905. He argued that Congress did not have authority to regulate trademarks unless they were used in interstate or international trade, based on its constitutional power over commerce. Therefore, he believed that federal courts should only have jurisdiction over cases involving such trademarks and state courts should handle all other disputes about them. Furthermore, he contended that this interpretation would avoid unnecessary expansion of federal power and interference with state rights.