Where can terms used in Claims be defined according to lexicography rules?

The correct answer is that terms used in claims can be defined in the specification and drawings filed with the application. This aligns with the principles of patent law, particularly those outlined in the Manual of Patent Examining Procedure (MPEP).

In patent examination, the specification provides a description of the invention and includes definitions of terms that may be used throughout the document, including in the claims. This allows for clarity and precision, ensuring that the claims convey the intended scope of the invention. Furthermore, the drawings can also play a role in defining specific terms by providing visual context that complements the written description.

Claim language is meant to be interpreted in light of the specification, and including definitions in the specification helps the examiner and the courts to understand what the applicant meant by certain terms. This principle ensures that the claims are supported by the disclosure and that they meet the requirements for definiteness and clarity as required by patent law.

Therefore, defining terms in the specification, in conjunction with the claims, promotes a more robust understanding of the invention’s scope and prevents ambiguity that could lead to challenges during prosecution or enforcement.