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On December 22, 2021, the United States Supreme Court issued a ruling in the case of Return Mail, Inc. v. United States Postal Service, which has significant implications for patent law in the United States. In this case, Return Mail, Inc. (RMI) held a patent for a system for processing undeliverable mail. RMI accused the United States Postal Service (USPS) of infringing on this patent by using a similar system without a license. The USPS argued that RMI's patent was invalid because it claimed an abstract idea, which is not eligible for patent protection under 35 U.S.C. § 101. The Supreme Court agreed with the USPS, ruling that RMI's patent was indeed invalid. This ruling is significant because it reaffirms the principle that patents cannot be granted for abstract ideas. In recent years, there has been a debate over the extent to which abstract ideas, such as algorithms, can be patented. The Supreme Court's decision in this case makes it clear that patents cannot be granted for abstract ideas, and that patents must be directed towards a specific, concrete application of an idea. The ruling in this case also has implications for patent holders and those accused of infringing on patents. Patent holders will now need to be more careful to ensure that their patents claim specific, concrete applications of ideas, rather than abstract ideas themselves. Those accused of infringing on patents will have more leeway to argue that the patent in question is invalid because it claims an abstract idea. Overall, the Supreme Court's ruling in the Return Mail, Inc. v. United States Postal Service case is a victory for those who believe in limiting the scope of patent protection and promoting innovation. It [...]