In the 1947 case of Sipuel v. Board of Regents of the University of Oklahoma, Ada Lois Sipuel Fisher, an African American woman from Chickasha, Oklahoma was denied admission to the University's law school solely based on her race. The Supreme Court ruled unanimously in favor of Sipuel stating that this denial violated her Fourteenth Amendment rights to equal protection under U.S law. The court directed that she be admitted to the university as it was obligated by state law to provide education for all its citizens and could not do so discriminatively based on race or color. This ruling marked a significant step towards ending racial segregation in graduate and professional education across America.

In the Sipuel v. Board of Regents of the University of Oklahoma case, there was no recorded dissenting opinion. The Supreme Court unanimously ruled in favor of Ada Lois Sipuel, stating that she could not be denied entrance to a state law school solely because of her race. This decision marked an important step towards ending segregation in American education systems.