In the case of Ex Parte American Steel Barrel Co. and Seaman, 1912, the U.S. Supreme Court dealt with a patent dispute between two companies over barrel-making machinery designs. The petitioner, American Steel Barrel Company and its president Mr. Seaman sought to overturn an earlier decision by the Circuit Court of Appeals which had ruled in favor of their competitor's patents validity (Continental Iron Works). They argued that Continental’s patent was invalid due to prior use and lack of novelty in its design features. The Supreme Court denied their petition for writs of mandamus (a court order compelling someone to execute a duty they are legally obligated to complete) against judges who refused their request for additional evidence presentation at trial level regarding these claims. This denial meant that lower court's ruling stood - validating Continental Iron Works' patents while rejecting arguments made by American Steel Barrel Co., thus marking another instance where higher courts upheld protection rights granted through intellectual property laws.

In the dissenting opinion for Ex Parte American Steel Barrel Co. and Seaman, it was argued that the court should not have jurisdiction over this case as it involves a dispute between private parties rather than a federal question. The dissenting justices believed that the majority's decision to hear this case represented an expansion of judicial power beyond its constitutional limits. They also disagreed with the majority's interpretation of patent law, arguing that it undermined established legal principles and created unnecessary confusion in an already complex area of law. Furthermore, they expressed concern about potential negative impacts on innovation and economic growth resulting from such uncertainty in patent rights protection.