The legal case between Leman et al. and Krentler-Arnold Hinge Last Co. (Leman v. Krentler-Arnold Hinge Last Co., 284 U.S. 448 (1932)) is a patent infringement dispute that was brought before the United States Supreme Court. The case involved the Krentler Company, which relied on its patent (No. 1,459,061) granted on June 19, 1923, as a defense against a counterclaim. The patent in question was for a hinge mechanism, specifically a last hinge used in the manufacturing of shoes.
The District Court had previously decided that the first Krentler patent was not infringed and that the only claim of the Carl patent, which was relied on (claim 1), was invalid. The Supreme Court, in this case, had to determine whether the District Court erred in its decision. The case is significant as it highlights the complexities of patent law, particularly in determining the validity and infringement of patents, as well as the potential consequences of violating a permanent injunction granted in an infringement suit. Ultimately, the Supreme Court affirmed parts of the District Court's decision, but the specifics of the ruling are not provided in the given text.