In the case of Cold Metal Process Co. et al. v. United Engineering & Foundry Co., the Supreme Court ruled in favor of Cold Metal Process Company, reversing a previous decision by the lower court that had found them guilty of patent infringement on two counts against United Engineering and Foundry Company's patents for rolling mill technology. The Supreme Court held that one count was invalid due to lack of novelty as it had been previously patented, while the other count was not infringed upon because Cold Metal’s process did not include all elements claimed in United’s patent specification - an essential requirement for establishing infringement under U.S Patent Law.

In the dissenting opinion for Cold Metal Process Co. et al. v. United Engineering & Foundry Co., Justice Reed argued that the majority's decision to uphold a patent infringement claim was incorrect due to their misinterpretation of precedent and failure to consider all relevant evidence. He contended that prior cases had established a clear standard for determining whether an invention was new or merely an improvement on existing technology, which he believed the majority failed to apply correctly in this case. Furthermore, he criticized them for disregarding key testimony from expert witnesses who suggested that the patented process was not as innovative as claimed by its inventors, thus should not be protected under patent law.