Board of Education (1899) - Upheld de jure segregation in schools. Guinn v. United States (1915) - Ruled certain grandfather clause provisions in Southern states to be unconstitutional. Nixon v. Herndon (1927) - Ruled all-white primary elections of the Texas Democratic Party to be unconstitutional. Nixon v. Condon (1932) - Ruled reformulated all-white primary elections of the Texas Democratic Party to be unconstitutional. Powell v. Alabama (1932) - Reversed verdict for the Scottsboro Boys. First overturning of state criminal conviction for violation of criminal procedural provisions. Grovey v. Townsend (1935) - Ruled reformulated all-white primary elections of the Texas Democratic Party to be unconstitutional. Breedlove v. Suttles (1937) - Upheld the poll tax. Gaines v. Canada (1938) - Ruled that states providing public education must provide educational opportunities to blacks. New Negro Alliance v. Sanitary Grocery Co. (1938) - Ruled in favor of the right to boycott during an African-American boycott of Safeway Inc. over discriminatory hiring practices. Lane v. Wilson (1939) - Overturned restrictive voter registration procedures of Oklahoma. Chambers v. Florida (1940) - Ruled that confessions gained under police pressure violate the Due Process Clause. Smith v. Allwright (1944) - Decisively prohibited all-white primary elections. Shelley v. Kraemer (1948) - Overturned housing covenants prohibiting occupation by ethnic minorities. McLaurin v. Oklahoma State Regents (overturned low court decision by same name) (1950) - ruled against segregation at public universities. Sweatt v. Painter (1950) - challenged the "separate but equal" doctrine. Henderson v. United States (1950) - abolished segregation in dining cars. Brown v. Board of Education - composed of four cases arising from states and a related federal case arising from the District of Columbia overturning segregation in schools and the separate-but-equal doctrine. Davis v. County School Board of Prince Edward County (1951) - the case arising from Virginia Briggs v. Elliott (1952) - the case arising from South Carolina Gebhart v. Belton (1952) - the case arising from Delaware Brown v. Board of Education of Topeka (1954) - the case arising from Kansas Bolling v. Sharpe (1954) - a related case arising from Washington, D.C. Lucy v. Adams (1955) - desegregated the University of Alabama Keys v. Carolina Coach Co. - ruled that the Interstate Commerce Act of 1887 prohibited segregation on interstate buses NAACP v. Alabama (1958) - Barred the State of Alabama from subpoenaing NAACP records and membership rolls. Gomillion v. Lightfoot (1960) - ruled that