In the case of Smith v. Townsend in 1892, the U.S Supreme Court ruled on a dispute regarding land ownership and patent rights. The plaintiff, Smith, claimed that he had purchased lands from an individual who had received them as part of a Congressional grant to aid railroad construction in California. However, these lands were within limits reserved for satisfying future grants to other railroads under pre-existing laws at the time of location and selection by his grantor's predecessor - Southern Pacific Railroad Company (SPRC). The defendant, Townsend argued that SPRC did not have valid title when it purportedly conveyed the property because Congress never intended to give one company such power over potential future grants for other companies' benefit. After reviewing relevant statutes and legislative history surrounding this issue carefully, Justice Brewer delivered the opinion of court affirming lower courts’ judgments favoring Townsend’s claim stating that no title passed from United States until issuance of patents which happened after conveyance by SPRC thus making its sale void.

In the dissenting opinion for Smith v. Townsend, 1892, Justice Brewer argued that the majority's decision was inconsistent with previous rulings of the Court and violated principles of equity. He contended that a patentee should not be able to extend their monopoly beyond what is explicitly granted in their patent by using ambiguous language or claiming rights over unpatented improvements made by others. In this case, he believed that Smith had no right to claim royalties from Townsend for his use of an improved version of a patented machine because these improvements were not covered under Smith's original patent. Furthermore, he asserted that allowing such claims would discourage innovation and unfairly penalize those who make valuable contributions to improving existing technologies.