In the case of California Powder Works v. Davis in 1893, the US Supreme Court ruled on a dispute involving patent rights for an explosive powder known as "Judson's Dynamite." The plaintiff, California Powder Works, claimed that they had exclusive rights to manufacture and sell this product based on their purchase of Judson's original patent. They accused Davis of infringing upon these rights by producing a similar explosive without their permission. However, Davis argued that he was not violating any patents because his product was different from Judson’s dynamite. The court sided with Davis after examining both products and finding significant differences between them. Specifically, it noted variations in composition and manufacturing processes which made each unique despite having some similarities. Therefore, it concluded that there was no infringement since two products were distinct enough to fall outside the scope of the same patent protection. This decision established important legal precedents regarding how closely related two inventions must be before one is considered an infringement upon another's patent rights.

In the dissenting opinion for California Powder Works v. Davis, Justice Brewer argued that the majority's decision was inconsistent with previous rulings and principles of contract law. He contended that a contract should not be considered void simply because it involves an illegal act if both parties knowingly entered into it willingly. In this case, he believed that since both parties were aware of the potential illegality but still agreed to proceed, they should bear their own losses rather than one party being able to recover damages from another due to its own wrongdoing. Furthermore, he pointed out inconsistencies in how similar cases had been handled by different courts across states and emphasized on uniformity in legal interpretation and application.