'Design' means only the features of shape, configuration, pattern or ornament or
composition of lines or colour or combination thereof applied to any article whether two
dimensional or three dimensional or in both forms, by any industrial process or means,
whether manual, mechanical or chemical, separate or combined, which in the finished
article appeal to and are judged solely by the eye, but does not include any mode or
principle or construction or anything which is in substance a mere mechanical device.