The purpose of an international preliminary examination1 is to formulate a preliminary and non-binding opinion as to whether the invention claimed appears to be novel, to involve an inventive step, and to be industrially applicable2. For the purposes of the examination, a claimed invention is considered novel if it is not anticipated by the prior art3, and it is considered to involve an inventive step if, having regard to the prior art, it is not at its priority date obvious to a person skilled in the art4. A claimed
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