Rice v. United States was a Supreme Court case that addressed the issue of whether a patentee could be held liable for infringement of a patent if the patentee had not been aware of the patent. The case was brought by the patentee, Rice, who had been sued by the United States for infringing a patent owned by the United States. Rice argued that he had not been aware of the patent and thus could not be held liable for infringement. The Supreme Court held that a patentee could be held liable for infringement even if they had not been aware of the patent. The Court reasoned that the patentee had a duty to investigate whether a patent existed before using the invention, and that failure to do so could result in liability for infringement. The Court also noted that the patentee had a duty to use reasonable care to avoid infringing a patent, and that failure to do so could also result in liability for infringement. In conclusion, the Supreme Court held that a patentee could be held liable for infringement even if they had not been aware of the patent. The Court reasoned that the patentee had a duty to investigate whether a patent existed before using the invention, and that failure to do so could result in liability for infringement. The Court also noted that the patentee had a duty to use reasonable care to avoid infringing a patent, and that failure to do so could also result in liability for infringement.

Justice Field delivered the dissenting opinion in Rice v. United States, arguing that Congress had no authority to pass a law which would allow for the seizure of property without due process of law. He argued that this was an unconstitutional exercise of power by Congress and violated the Fifth Amendment's protection against deprivation of life, liberty or property without due process. The majority opinion held that since there was no actual taking or physical interference with the plaintiff's possession, it did not constitute a violation of their rights under the Constitution. Justice Field disagreed with this reasoning and argued that even if there is no physical interference with one’s possession, any attempt to take away someone’s right to possess something still constitutes a “taking” under constitutional standards and therefore requires due process before such action can be taken. He further noted that while Congress may have intended its actions as beneficial for society at large, they should not be allowed to violate individual rights in order to do so; thus he concluded his dissent by stating his belief that allowing such seizures would set a dangerous precedent which could lead to future abuses by government officials who are given too much discretion over private property matters.