International Union of United Automobile, Etc. Workers of America, C. I. O., et al. v. O'Brien, Prosecuting Attorney, et al.

Decided May 8, 1950. Frederick Moore Vinson delivered the opinion of the Court.

Docket 456 · 339 U.S. 454 (1950) · Cited 172 times

We don’t yet publish a summary of this opinion — read the official text below for the Court’s holding and reasoning.

How the Justices voted

Decided 9–0.

“Concurring” means agreeing with the outcome; any split shown is the Court’s judgment, not each Justice’s reasoning. Source: the Supreme Court Database (Spaeth et al.), Washington University.

Precedents cited

Supreme Court decisions this opinion relies on, ordered by how often it cites each. Cases in our collection link through; others are named.

• Bethlehem Steel Co. v. New York State Labor Relations Board · 330 U.S. 767 (1947)
• International Union, U. A. W. A., A. F. of L., Local 232 v. Wisconsin Employment Relations Board · 336 U.S. 245 (1949)
• La Crosse Telephone Corp. v. Wisconsin Employment Relations Board · 336 U.S. 18 (1949)
• Allen-Bradley Local No. 1111 v. Wisconsin Employment Relations Board · 315 U.S. 740 (1942)
• National Labor Relations Board v. Fansteel Metallurgical Corp. · 306 U.S. 240 (1939)

Cited by

Later Supreme Court opinions in our collection that cite this case.

• Amalgamated Ass'n of Street, Electric Railway & Motor Coach Employees of America, Division 998 v. Wisconsin Employment Relations Board · 340 U.S. 383 (1951)
• San Diego Building Trades Council v. Garmon · 359 U.S. 236 (1959)
• International Union, United Automobile, Aircraft & Agricultural Implement Workers v. Russell · 356 U.S. 634 (1958)
• Golden State Transit Corp. v. City of Los Angeles · 493 U.S. 103 (1989)
• National Labor Relations Board v. Erie Resistor Corp. · 373 U.S. 221 (1963)
• Brotherhood of Railroad Trainmen v. Jacksonville Terminal Co. · 394 U.S. 369 (1969)
• United Construction Workers v. Laburnum Construction Corp. · 347 U.S. 656 (1954)
• Weber v. Anheuser-Busch, Inc. · 348 U.S. 468 (1955)
• Local 20, Teamsters, Chauffeurs & Helpers Union v. Morton · 377 U.S. 252 (1964)
• Brown v. Hotel & Restaurant Employees & Bartenders International Union Local 54 · 468 U.S. 491 (1984)
• Local 24, International Brotherhood of Teamsters v. Oliver · 358 U.S. 283 (1959)
• National Labor Relations Board v. International Rice Milling Co. · 341 U.S. 665 (1951)
• United Automobile, Aircraft & Agricultural Implement Workers of America v. Wisconsin Employment Relations Board · 351 U.S. 266 (1956)

Official text

Read the official opinion (U.S. Reports, govinfo.gov)

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Source: the U.S. Reports via govinfo.gov; authoring Justice and vote lineup from the Supreme Court Database (Washington University). Citation count from the Free Law Project’s CourtListener bulk data. Data last verified 2026-07-03. Informational only; verify against the primary source before relying. Not a consumer report (FCRA).