Which linguistic technique did Xerox unknowingly pioneer that later became a major concern for brands, leading to the addition of special clauses in trademark law?

In the world of language and linguistics, marketing campaigns often leverage sophisticated linguistic techniques to create memorable brand identities. From phonaesthetics (the study of beautiful sounds) to neologisms (newly created words), language experts carefully craft slogans and brand names to evoke specific emotional and psychological responses. Test your knowledge about a famous linguistic innovation in brand marketing that revolutionized how companies name their products.

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Genericization - when a brand name becomes the generic term for a product category (e.g., using 'xerox' as a verb meaning 'to photocopy')
Phonetic symbolism - using sounds that subconsciously suggest product attributes (like the 'crisp' sound in Pringles)
Semantic transparency - creating names that directly describe product function (like 'DieHard' batteries)
Sound symbolism reduplication - repeating similar sounds for memorability (like Coca-Cola)