Merger Doctrine

/ˈmɜːr.dʒər ˈdɒk.trɪn/

A copyright principle holding that when an idea can only be expressed in one or a very limited number of ways, the idea and expression merge, denying copyright protection to prevent monopolizing the idea.

Interactive Crucible: Merger Doctrine Filtration

MERGER APPLIES · UNPROTECTABLE

Number of Alternate Ways to Express the Underlying Idea:1 alternative paths

Doctrine of Merger Triggered: Because there are virtually no other ways to express this concept, the expression merges with the idea and is denied copyright protection to prevent a monopoly over the idea itself.

Operational Jurisprudential Axiom:

“When the path from idea to expression is singular, the expression belongs to the commons.”

Canonical Precedent:

Herbert Rosenthal Jewelry Corp. v. Kalpakian, 446 F.2d 738 (9th Cir. 1971)

Archival Notes:

Frequently applied to standardized UI affordances, button layouts, and mathematical data structures.