New Zealand Needle Manufacturers Ltd v Taylor and Another - [1975] 2 NZLR 33

Contract — Alteration — Difference between rescission and variation of original contract — Alteration for the benefit of one party only is not effective unless there is consideration.

Master and servant — Duties and liabilities of servant on termination of employment — Disclosure of confidential information — Copying of unpatented machine made by former employer — Implied term that machine was confidential — Confidence may be breached even if secret process committed to memory — Criteria of confidential secret information as distinct from information gained by trade experience.