United States

Zenith Radio Corp. v. Hazeltine Research, Inc.

401 U.S. 321 (1971)

JurisdictionUnited States

Year1971

Statusunclear

Key Principle

Addresses amendment and party practice constraints in federal litigation (often paired with Foman leave-to-amend doctrine).

Civil Procedure — amendments / parties

Klein v. Martin 607 U. S. 213 (2026)

Glossip v Oklahoma 604 U.S. 226 (2025)

Cunningham v. Cornell 604 U.S. 693 (2025)

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