The Essentials of Patent Claim Drafting is a practical guide to the drafting of patent claims in U.S. patent applications. The actual mechanics of assembling both basic and complex claims are covered in-depth from simple mechanical cases to complex chemical and pharmaceutical cases. The emphasis is on the how-to of claim drafting, rather than on the history and theory of claiming. It contains multiple examples for all types of claims which a practitioner is likely to draft, and provides an easy reference for the drafting of particular types of claims.