<P> State of the art (sometimes cutting edge) refers to the highest level of general development, as of a device, technique, or scientific field achieved at a particular time . It also refers to such a level of development reached at any particular time as a result of the common methodologies employed at the time . </P> <P> The term has been used since 1910, and has become both a common term in advertising and marketing, and a legally significant phrase with respect to both patent law and tort liability . </P>

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