Question: Which of the cases had the decision overturned, Plessy v. Ferguson or Lochner v. New York?

Context articles: Sweatt v. Painter
Brown v. Board of Education
Albion W. Tourgée
Constitutional colorblindness
Homer Plessy
Plessy v. Ferguson
Eastern Enterprises v. Apfel
John Howard Ferguson
Lochner era
Lochner v. New York

Sweatt v. Painter, 339 U.S. 629 (1950) , was a U.S. Supreme Court case that successfully challenged the "separate but equal" doctrine of racial segregation established by the 1896 case "Plessy v. Ferguson".
 The case was influential in the landmark case of "Brown v. Board of Education" four years later.
Brown v. Board of Education of Topeka, 347 U.S. 483 (1954) , was a landmark United States Supreme Court case in which the Court declared state laws establishing separate public schools for black and white students to be unconstitutional.
 The decision overturned the "Plessy v. Ferguson" decision of 1896, which allowed state-sponsored segregation, insofar as it applied to public education.
 Handed down on May 17, 1954, the Warren Court's unanimous (9–0) decision stated that "separate educational facilities are inherently unequal."
 As a result, "de jure" racial segregation was ruled a violation of the Equal Protection Clause of the Fourteenth Amendment of the United States Constitution.
 This ruling paved the way for integration and was a major victory of the Civil Rights Movement, and a model for many future impact litigation cases.
 However, the decision's fourteen pages did not spell out any sort of method for ending racial segregation in schools, and the Court's second decision in "Brown II", 349 U.S. 294 (1955) only ordered states to desegregate "with all deliberate speed".
Albion Winegar Tourgée (May 2, 1838 – May 21, 1905) was an American soldier, Radical Republican, lawyer, writer, politician, and diplomat.
 A pioneer civil rights activist, he founded the National Citizens' Rights Association, established the historically black women's college Bennett College, and litigated for the plaintiff Homer Plessy in the famous segregation case "Plessy v. Ferguson" (1896).
 Historian Mark Elliott credits Tourgée with introducing the metaphor of "color-blind justice" into legal discourse.
Constitutional colorblindness is an aspect of United States Supreme Court case evaluation that began with Justice Harlan's dissent in "Plessy v. Ferguson "in 1896.
 Prior to this (and for a good while afterwards), the Supreme Court considered color as a determining factor in many landmark cases.
 Constitutional colorblindness holds that skin color or race is virtually never a legitimate ground for legal or political distinctions, and thus, any law that is "color conscious" is presumptively unconstitutional regardless of whether its intent is to subordinate a group, or remedy discrimination.
 The concept, therefore, has been brought to bear both against vestiges of Jim Crow oppression, as well as remedial efforts aimed at overcoming such discrimination, such as affirmative action.
Homer Adolph Plessy (March 17, 1862 – March 1, 1925) was a Louisiana French-speaking Creole plaintiff in the United States Supreme Court decision in "Plessy v. Ferguson".
Plessy v. Ferguson, 163 US 537 (1896) was a landmark constitutional law case of the US Supreme Court decided in 1896.
 It upheld state racial segregation laws for public facilities under the doctrine of "separate but equal".
 The decision was handed down by a vote of 7 to 1 with the majority opinion written by Justice Henry Billings Brown and the dissent written by Justice John Marshall Harlan.
Eastern Enterprises v. Apfel, 524 U.S. 498 (1998), is a United States Supreme Court case in which the Court held that the Coal Industry Retiree Health Benefit Act (Coal Act) constituted an unconstitutional regulatory taking of property which required the Act to be invalidated.
 The import of this decision is that it was made in the context of a purely economic regulation.
 The plurality examines the statute and its resultant harm as an ad hoc factual inquiry based on factors delineated in Penn Central such as the economic impact of the regulation, its interference with reasonable investment backed expectations, and the character of the governmental action.
("Penn Central Transportation Co. v. New York City"), The decision thereby moved beyond the traditional notions of equal protection which had been applied to economic regulation since the time of ("Lochner v. New York"), requiring extreme deference to Congress, and applied a regulatory takings analysis to the problem resulting in a much less deferential result.
 While the plurality recognizes that this is not a traditional takings case where the government appropriates private property for public use, they also state this is the type of case where the "Armstrong Principle" of preventing the government from forcing some people alone to bear public burdens which, in all fairness and justice, should be borne by the public as a whole.
 ("Armstrong v. United States", 364 U.S. 40, 49 (1960)) However, while the plurality seems to invalidate this particular law on takings grounds, the concurrences and the dissents warn of such an analysis as this should actually be examined under substantive due process or ex post facto theories.
John Howard Ferguson (June 10, 1838 – November 12, 1915) was an American lawyer and judge from Louisiana, most famous as the defendant in the "Plessy v. Ferguson" case.
 Ferguson was born the third and last child to Baptist parents (John H. Ferguson & Sarah Davis Luce) on June 10, 1838 in Chilmark, Massachusetts.
 The son, grandson, great-grandson, and great-great-grandson of Martha's Vineyard (Chimark & Tisbury) Master Mariners, John Howard Ferguson chose a different vocational path and taught school in his early years, finally setting about to study law.
 Young Ferguson's family was all but wiped out between 1849–1861, and after the Civil War ended, and he had completed his legal studies in Boston under the tutelage of Benjamin F. Hallett, Ferguson moved to New Orleans in 1865.
 There he met and married in July 1866, Virginia Butler Earhart, daughter of Thomas Jefferson Earhart, a staunch and outspoken abolitionist from Pennsylvania.
 The Fergusons raised three sons (Walter Judson, Milo & Donald Ferguson) in Burtheville (Uptown New Orleans) at 1500 Henry Clay Avenue.
 The house still stands today and is designated a historical landmark of the 1989 Orleans Parish Landmarks Commission.
The "Lochner" era is a period in American legal history from 1897 to 1937 in which the Supreme Court of the United States is said to have made it a common practice "to strike down economic regulations adopted by a State based on the Court’s own notions of the most appropriate means for the State to implement its considered policies," by using its interpretation of substantive due process to strike down laws held to be infringing on economic liberty or private contract rights.
 The era takes its name from a 1905 case, "Lochner v. New York".
 The beginning of the era is usually marked earlier, with the Court's decision in "Allgeyer v. Louisiana" (1897), and its end marked forty years later in the case of "West Coast Hotel Co. v. Parrish" (1937), which overturned an earlier "Lochner"-era decision.
Lochner v. New York, 198 US 45 (1905) was a landmark US labor law case in the US Supreme Court, holding that limits to working time violated the Fourteenth Amendment.
 This decision has since been overturned.