Under United States trademark law, the functionality doctrine provides that product features that are functional cannot be protected as trademarks. A product feature is considered functional if it is essential to the product’s use or purpose, or if it has an impact on the product’s cost or quality.
Under United States trademark law, the functionality doctrine provides that product features that are functional cannot be protected as trademarks. A product feature is considered functional if it is essential to the product’s use or purpose, or if it has an impact on the product’s cost or quality.
Source: Wikipedia "Functionality doctrine" · CC BY-SA 4.0
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