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We’ve all been there. The Office Action for your client’s latest US patent application contains an inventive step objection based on the combination of two documents. The documents together appear to be relevant to your main claim but the client swears blind that the documents would never be combined to arrive at the invention. What do you do? How can you argue against such a combination of prior art. Well, here is a brief compilation of relevant US cases bearing on the obviousness of combinations*. (more…)