In the 1890 case of Marsh v. Nichols, Shepard & Co., the United States Supreme Court dealt with a patent dispute over improvements in grain separators for threshing machines. The plaintiff, Charles M. Marsh, claimed that his patented invention was infringed upon by Nichols, Shepard & Co., who were manufacturing and selling similar devices based on an earlier expired patent held by Marsh himself. The court ruled in favor of Nichols, Shepard & Co., stating that once a patent expires anyone is free to use it as they wish without infringing upon any subsequent patents issued to the original inventor for improvements on their initial design unless those improvements are distinctly different from the original concept or idea.

In the dissenting opinion for Marsh v. Nichols, Shepard & Co., Justice Bradley argued that the patent in question should not be invalidated due to a lack of novelty. He contended that while similar machines may have existed prior to Marsh's invention, none performed their functions in quite the same way or with as much efficiency and effectiveness. The majority opinion had focused on individual components of Marsh's machine being unoriginal; however, Bradley believed this perspective was flawed because it failed to consider how these parts worked together as a whole system - which he saw as an innovative step deserving of protection under patent law. Furthermore, he disagreed with the majority’s interpretation of “prior use”, stating it should only apply if previous usage was public and widespread enough to constitute common knowledge among those skilled in relevant fields – something he did not believe could be proven here.