Prior art made available to the public anywhere in the world by non-written disclosure 

A non-written disclosure is not considered part of the prior art for the purposes of Art. 33(2) and (3) if the date of that non-written disclosure is indicated in a written disclosure which has been made available to the public on or after the relevant date of the application (i.e. on or after the international filing date or, if a priority has been validly claimed, the earliest priority date).

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