What is the difference between obvious and non-obvious mistakes in international patent applications?

The MPEP 1876 distinguishes between obvious and non-obvious mistakes in international patent applications: Obvious mistakes are addressed using Form PCT/IPEA/411. Non-obvious mistakes are handled differently: “Mistakes that are not obvious may be called to applicant’s attention in Box VII of PCT/IPEA/408.” This distinction is important because it affects how examiners communicate with applicants about different…

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