I. Introduction; II. Novelty; III. Inventive step - recognizing invention; IV. Qualifying subject-matter; V. Clarity, enablement and utility; VI. Claim construction; VII. Functional claims; VIII. Brushing up our drafting; IX. Claim drafting - the British tradition; X. Technical field; XI. The background section and the closest prior art; XII. Defining the invention; XIII. A case study based on windsurfer; XIV. Empirical research inventions - allowable generic claim scope; XV. Can "reach-through" claims be enforced? the US federal court decision in university of Rochester v G. D. Searle & Co., Inc et al; XVI. Workmate.