Experienced patent drafters have patents invalidated every day for reasons that are largely based on avoidable error. Rules of Patent Drafting: Guidelines from the Federal Circuit helps patent drafters avoid such errors by setting out and explaining the legal principles that govern patent prosecution, as set out by the Federal Circuit, the appellate division for all patent cases in the federal courts of the United States. The underlying theory of such an approach is that if one understands the rule - as distilled from the relevant Federal Circuit cases - one will also understand the law.
Rules of Patent Drafting: Guidelines from the Federal Circuit is broken down according to these rules, each of which will be explained and presented along with the exact language judges have used to describe it. In addition, there is a supplemental section on writing, which though not specifically addressed by the Federal Circuit, is a topic that lends itself quite naturally to the presentation of the rules in question.