The Patterson et al. v. Louisville & Nashville Railroad Co. et al., 1925 case revolved around the issue of whether a state law could regulate interstate commerce, specifically in relation to railroad rates for intrastate travel that indirectly affected interstate fares due to their interconnected nature. The plaintiffs, Patterson and others, were shippers who argued that the Kentucky State Rate Case (which set maximum rail freight charges) was unconstitutional as it interfered with interstate commerce by causing an increase in their costs for shipping goods across state lines via the defendant's railway system - Louisville & Nashville Railroad Company. However, the Supreme Court ruled against them stating that while Congress had authority over interstate commerce under Commerce Clause of Constitution; states also retained power to regulate local matters affecting such trade unless federal legislation superseded this right or if local regulations directly burdened or obstructed national interests excessively which wasn't proven here conclusively by plaintiffs. Thus, court upheld validity of Kentucky’s rate-setting statute emphasizing on balance between federal and state powers regarding commercial regulation within constitutional framework.

In the dissenting opinion for Patterson et al. v. Louisville & Nashville Railroad Co., Justice Oliver Wendell Holmes Jr. argued that the majority's decision was inconsistent with previous rulings of the Court and violated principles of federalism by allowing a state to regulate interstate commerce in ways that could potentially disrupt it. He contended that while states have some power to regulate local aspects of interstate commerce, they should not be allowed to impose regulations which might interfere with its free flow or place burdens on it beyond what is necessary for safety and convenience within their borders. In this case, he believed Kentucky’s law requiring railroads operating in the state to maintain offices there imposed an undue burden on interstate commerce as it forced companies like L&N Railroad Co., whose operations extended beyond Kentucky, into unnecessary expenditures and inconveniences without any clear benefit for public welfare or safety.