Spector Motor Service, Inc. v. O'Connor

340 U.S. 602 · Decided March 26, 1951 · Supreme Court of the United States

At a glance

Spector Motor Service, Inc. v. O'Connor was decided on March 26, 1951 by a vote of 6–3. The Court reversed the lower court's decision. Justice Harold H. Burton wrote the opinion of the Court. SCDB classifies its main issue as “State or local government tax” in the Economic Activity area. SCDB records that the Court declared a state or territorial law, regulation or constitutional provision unconstitutional.

Read the opinion

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

Case details

How the Justices voted

Full case caption

Spector Motor Service, Inc. v. O'Connor, Tax Commissioner

SCDB identifiers: case 1950-051, docket 1950-051-01.

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Other cases on “State or local government tax”

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  342 U.S. 232Decided January 7, 19528–0William O. Douglas
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Cases on the same legal provision: Article I, Section 8, Paragraph 3 (interstate commerce clause)

• Panhandle Eastern Pipe Line Co. v. Michigan Public Service Commission
  341 U.S. 329Decided May 14, 19517–2Sherman Minton
• Dean Milk Co. v. City of MadisonLaw held unconstitutional
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• Breard v. Alexandria
  341 U.S. 622Decided June 4, 19516–3Stanley F. Reed
• Lloyd A. Fry Roofing Co. v. Wood
  344 U.S. 157Decided December 8, 19525–4Hugo L. Black
• California v. Zook
  336 U.S. 725Decided April 25, 19495–4Frank Murphy
• Toomer v. WitsellLaw held unconstitutional
  334 U.S. 385Decided June 7, 19489–0Fred M. Vinson

Same Term, same area (Economic Activity)

• Fogarty v. United States
  340 U.S. 8Decided November 6, 19509–0Sherman Minton
• Standard Oil Company of New Jersey v. United States
  340 U.S. 54Decided November 27, 19506–3Hugo L. Black
• Libby v. United States
  340 U.S. 71Decided November 27, 19506–3Hugo L. Black
• United States v. United States Gypsum Co.
  340 U.S. 76Decided November 27, 19506–1Stanley F. Reed
• Feres v. United States
  340 U.S. 135Decided December 4, 19509–0Robert H. Jackson
• Great Atlantic & Pacific Tea Co. v. Supermarket Equipment Corp.
  340 U.S. 147Decided December 4, 19509–0Robert H. Jackson

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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