National Labor Relations Board v. Highland Park Manufacturing Co.

341 U.S. 322 · Decided May 14, 1951 · Supreme Court of the United States

At a glance

National Labor Relations Board v. Highland Park Manufacturing Co. was decided on May 14, 1951 by a vote of 6–2. The Court affirmed the lower court's decision. Justice Robert H. Jackson wrote the opinion of the Court. SCDB classifies its main issue as “Loyalty oath or non-Communist affidavit (general)” in the First Amendment area.

Read the opinion

• CourtListener (Free Law Project) — opinion text
• Library of Congress — official U.S. Reports scan

Case details

How the Justices voted

Did not participate: Hugo L. Black.

Full case caption

National Labor Relations Board v. Highland Park Manufacturing Co.

SCDB identifiers: case 1950-077, docket 1950-077-01.

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Cases on the same legal provision: Labor-Management Relations Act

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Same Term, same area (First Amendment)

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Source: Supreme Court Database, 2026 Release 01 (data file dated September 8, 2026). Imported into CaseTrail November 5, 2026. Coverage: decisions from the 1946 through 2025 Terms. Methodology · Report an error