In the case of Jungersen v. Ostby & Barton Co., 1948, the US Supreme Court was asked to decide on a patent dispute. The plaintiff, Jungersen, had developed and patented an improved method for making jewelry settings which he claimed were being infringed upon by Ostby & Barton Co. However, the defendants argued that his patents were invalid as they lacked novelty and inventiveness - two key requirements for patentability under U.S law. After considering both sides' arguments and evidence presented in lower courts, the Supreme Court ruled in favor of Ostby & Barton Co., upholding their contention that Jungersen's patents did not meet legal standards for novelty or non-obviousness because similar methods had been used previously within the industry.

In the dissenting opinion for Jungersen v. Ostby & Barton Co., Justice Jackson disagreed with the majority's decision to uphold a patent on a process for making costume jewelry, arguing that it did not meet the criteria of novelty and non-obviousness required by patent law. He contended that combining known elements in an obvious way should not be considered inventive or worthy of protection under patent laws. Furthermore, he expressed concerns about granting monopolies too easily which could hinder competition and innovation rather than promoting them as intended by patents system. He also criticized the court's reliance on expert testimony regarding industry standards at the time when assessing inventiveness, suggesting this approach was flawed because experts often have vested interests in maintaining existing practices and resisting change.