essentiality
C2CEFR level
75/100Rarity: rare
TechnicalRegister
The quality of a patent being unavoidably infringed by implementing a technical standard.
The parties disputed the essentiality of several patents declared standard-essential.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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