inventive step and non-obviousness

The inventive step and non-obviousness reflect a same general patentability requirement present in most patent laws, according to which an invention should be sufficiently inventive — i.e., non-obvious — in order to be patented. The expression "inventive step" is predominantly used for instance in Germany, in the United Kingdom and under the European Patent Convention (EPC), while the expression "non-obviousness" is predominantly used in United States patent law. Although the basic principle is roughly the same, the assessment of the inventive step and non-obviousness varies from one country to another. For instance, the practice of the European Patent Office (EPO) differs from the practice in the United Kingdom.
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