Is Writing Your Own Dictionary Dangerous? Yes.

While a patent practitioner's work may not qualify for hazard pay, significant responsibilities include imagining how a patent may be interpreted in the future and avoiding potential negative consequences arising from the words the practitioner used to describe an invention. A powerful tool in a patent professional's drafting toolbox is the ability to assign a particular definition to any term used in a patent – to act as a "lexicographer." As a lexicographer, a patent drafter has the ability to simply restate the common meaning of a term for clarity or to assign an alternate – such as an expanded or narrowed – meaning to the term. The ability to act as a lexicographer is especially useful when the drafter wishes to use a term differently than the term's "ordinary and plain meaning," but can have unintended consequences when careful attention is not given to the specific use of terminology throughout a patent specification. A recent suit, Aortic Innovations LLC v.