prior art
B2CEFR level
55/100Rarity: uncommon
TechnicalRegister
All information made public before a patent's filing date that is relevant to assessing the novelty of the invention.
The examiner cited an obscure Japanese patent as prior art that anticipated our client's claims.
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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