Errors in prior art documents 

Errors may exist in prior art documents. If, using common general knowledge (see G‑VII, 3.1), the skilled person can

see at once that the disclosure of a relevant prior art document contains errors, and 
identify what the only possible correction should be, 

then the errors in the disclosure do not affect its relevance as prior art. The document can thus be considered to contain the correction when assessing its relevance to patentability (see T 591/90).

For possible errors concerning compound records in online databases, see B‑VI, 6.5.


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