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California Motor Transport Co. v. Trucking Unlimited

1972 United States Supreme Court case

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionJun 5, 2026
Entity authorityQ19019749 ↗
Source-derived summary

California Motor Transport Co. v. Trucking Unlimited, 404 U.S. 508 (1972), is a landmark decision of the United States Supreme Court involving the right to make petitions to the government. The right to petition is enshrined in the First Amendment to the United States Constitution as: "Congress shall make no law...abridging...the right of the people...to petition the Government for a redress of grievances." This case involved the claim that one group of companies was using state and federal regulatory actions to eliminate competitors. The Supreme Court ruled that the right to petition is integral to the legal system but using lawful means to achieve unlawful restraint of trade is not protected in some instances.

Antitrust law

Antitrust law is the body of laws that exist in order to prevent companies from suppressing market competition from other companies. The Sherman Antitrust Act was a landmark piece of federal legislation passed in 1890 and "intended to prevent all contracts, combinations, and conspiracies which restrain or monopolize trade." The Clayton Antitrust Act followed in 1914 and allowed parties injured by anti-competitive actions to sue the violators for both injunctive relief (meaning the anti-competitive action had to stop) and treble damages (meaning the actual monetary damages suffered by the injured party would be multiplied by three times when determining the award granted).

In two cases interpreting these laws (Eastern Railroad Conference v. Noerr Motor Freight Inc. and United Mine Workers v.

Editorial summary

The public source identifies “California Motor Transport Co. v. Trucking Unlimited” as 1972 United States Supreme Court case. This brief keeps that definition visible, then builds a research path around California, Motor and Transport.

Editorial reviewA dependable orientation record for establishing vocabulary, names and a first evidence trail. The current lead gives the account dated anchors—1972, 1890, 1914—that can be checked directly. The selected authority fields contribute no independent date. Its value is orientation rather than verdict, with California, Motor and Transport providing the first useful test.
Editorial analysis

Why this record matters

A short description can identify a subject without explaining its stakes. For “California Motor Transport Co. v. Trucking Unlimited”, the useful work is to connect “1972 United States Supreme Court case” to the records capable of establishing context and consequence.

Evidence profile

Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Jun 5, 2026. The linked authority identifier is Q19019749. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1972, 1890 and 1914.

Critical limits

The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

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Source & attribution

This entry incorporates text from “California Motor Transport Co. v. Trucking Unlimited” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.