5 7 or original. The novelty or originality of the particular part may be sufficient to impart the character of novelty and originality to the whole." Where the novel part of a design is nothing more than an ordinary trade variant, it is insufficient to impart that character. See Phillips v Harbro Rubber Co (1920) 37 RPC 233 at p. 240 lines 31-36. LORD MOULTON said (ubi cit at lines 9-13): "The working world, as well as the trade world, is entitled at its will to take, in all cases, its choice of ordinary trade variants for use in any parti¬ cular instance, and ... no registration of a design can prevent an ordinary workman from using, or not using trade knowledge of this kind." The window structure of a sea-going ski boat is the......