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National Mutual Insurance Co. v. Tidewater Transfer Co., Inc.

337 U.S. 582 · Decided June 20, 1949 · Supreme Court of the United States

Record summary. This page is generated from the Supreme Court Database’s coded data about the case. It describes who decided what, not the Court’s reasoning. Read the opinion itself before relying on it. Not legal advice.

At a glance

National Mutual Insurance Co. v. Tidewater Transfer Co., Inc. was decided on June 20, 1949 by a vote of 5–4. The Court reversed the lower court's decision. Justice Robert H. Jackson wrote the opinion announcing the judgment of the Court. SCDB classifies its main issue as “Miscellaneous judicial power and diversity jurisdiction” in the Judicial Power area.

Read the opinion

Case details

Citations
337 U.S. 582 · 69 S. Ct. 1173 · 93 L. Ed. 2d 1556 · 1949 U.S. LEXIS 2924
Docket number
29
Decided
June 20, 1949
Argued
November 8, 1948
Court era
Vinson Court
Decision type
Judgment of the Court (orally argued)
Disposition
Reversed
Outcome for petitioner
The petitioning party received a favorable disposition
Vote
5–4
Majority opinion
Robert H. Jackson
Opinion assigned by
Fred M. Vinson
How the case arrived
Certiorari
Issue area
Judicial Power
Legal provision
Article I, Section 8, Paragraph 17 (governance of the District of Columbia and lands purchased from the states)
Type of law
Constitution
Decision direction (SCDB)
Liberal what this means

How the Justices voted

JusticeVoteSeparate writing
Justice Hugo L. BlackMajority
Justice Stanley F. ReedDissent
Justice Felix FrankfurterDissentWrote an opinion
Justice William O. DouglasDissent
Justice Frank MurphySpecial concurrence
Justice Robert H. JacksonJudgment of the CourtWrote an opinion
Justice Wiley B. RutledgeSpecial concurrenceWrote an opinion
Justice Harold H. BurtonMajority
Chief Justice Fred M. VinsonDissentWrote an opinion

Full case caption

National Mutual Insurance Co. v. Tidewater Transfer Co., Inc.

SCDB identifiers: case 1948-103, docket 1948-103-01.

Other cases on “Miscellaneous judicial power and diversity jurisdiction”

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Cases on the same legal provision: Article I, Section 8, Paragraph 17 (governance of the District of Columbia and lands purchased from the states)

Same Term, same area (Judicial Power)

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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