set of articles "set of articles" means a number of articles that are of the same general character and ordinarily on sale together, or intended to be used together, being articles to each of which there is applied an industrial design that is the same as, or which differs only in immaterial details or in features commonly used in the relevant trade from, the industrial design applied to the other articles or to any of them; ACT 552 - INDUSTRIAL DESIGNS ACT 1996 3. Interpretation.