Partial Problems
When applying the problem-solution approach, the objective technical problem is sometimes regarded as an aggregation of a plurality of "partial problems". "This is the case where there is no technical effect achieved by all the distinguishing features taken in combination, but rather a plurality of partial problems is independently solved by different sets of distinguishing features." In that case, each set of distinguishing features is assessed independently.
For instance, two differences may be identified between the claimed subject-matter and a document considered to be the closest prior art, whereas these two differences solve two different objective problems which are independent from each other. The two objective problems may then be treated "as separate partial problems for the purposes of assessing inventive step."
Read more about this topic: Inventive Step Under The European Patent Convention
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