In the Miller v. Eagle Manufacturing Company case of 1893, the U.S Supreme Court was asked to determine whether a patent for an improvement in oil-can openers had been infringed upon by Eagle Manufacturing Company. The plaintiff, Miller, alleged that his patented invention - a device designed to cut into and form an opening in oil cans without causing spillage or waste - had been copied by the defendant company. However, after examining both devices closely and considering their mechanisms of operation, the court concluded that there were significant differences between them. While they served similar purposes and shared some common features (as would be expected given their intended function), these similarities did not constitute infringement as per patent law standards at that time because they didn't copy any new or unique elements introduced by Miller's design specifically. Therefore, it ruled in favor of Eagle Manufacturing Company.

The dissenting opinion in the case of Miller v. Eagle Manufacturing Company argued that the majority's decision was incorrect because it failed to properly interpret and apply patent law. The dissent believed that the plaintiff, Mr. Miller, should have been granted a patent for his invention as he had made significant improvements to an existing machine used in oil production processes. They contended that these improvements were not obvious or trivial but rather constituted a new and useful improvement deserving of legal protection under U.S patent laws. Furthermore, they disagreed with the majority's view on what constitutes novelty in inventions arguing that even small changes can lead to substantial differences in efficiency or effectiveness which are worthy of patents.