Smale v North Sails Ltd - [1991] 3 NZLR 19

Patents — Revocation — Plaintiff brought proceedings for infringement of patent relating to yacht sails — Defendant sought revocation of patent on grounds of prior publication and obviousness — Whether invention was new — Whether, even if invention was new, it was obvious and lacked an inventive step — Whether patent should be revoked — Patents Act 1953, s 41.