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Text: The Postal Service first argues that the AIA’s reference to a “person” in the context of post-issuance review proceedings must include the Government because other references to persons in the patent statutes appear to do so. Indeed, it is often true that when Congress uses a word to mean one thing in one part of the statute, it will mean the same thing elsewhere in the statute. See Merrill Lynch, Pierce, Fenner & Smith Inc. v. Dabit, 547 U. S. 71, 86 (2006). This principle, however, “readily yields to context,” especially when a statutory term is used throughout a statute and takes on “distinct characters” in distinct statutory provisions. See Utility Air Regulatory Group v. EPA, 573 U. S. 302, 320 (2014) (internal quotation marks omitted). That is the case here. The Patent Act and the AIA refer to “person[s]” in at least 18 different places, and there is no clear trend: Sometimes “person” plainly includes the Government,3 sometimes it plainly excludes the Government,4 and sometimes—as here—it might be read either way.

Looking on the bright side, the Postal Service and the dissent, see post, at 2, focus on §207(a)(1), which authorizes “[e]ach [f]ederal agency” to “apply for, obtain, and maintain patents or other forms of protection . . . on inventions in which the Federal Government owns a right, title, or interest.” It follows from §207(a)(1)’s express inclusion of federal agencies among those eligible to apply for patents that the statute’s references to “person[s]” in the subsections governing the patent-application process and questions of patentability (§§102(a), 118, and 119) must also include federal agencies.5 In other words, the right described in §207(a)(1) provides a sufficient contextual clue that the word “person”—when used in the other provisions governing the application process §207(a)(1) makes available to federal agencies—includes the Government.

But §207(a)(1) provides no such clue as to the interpretation of the AIA review provisions because it implies nothing about what a federal agency may or may not do following the issuance of someone else’s patent. Conversely, reading the review provisions to exclude the Government has no bearing on a federal agency’s right to obtain a patent under §207(a)(1). An agency may still apply for and obtain patents whether or not it may petition for a review proceeding under the AIA seeking cancellation of a patent it does not own. There is thus no reason to think that “person” must mean the same thing in these two different parts of the statute. See Utility Air, 573 U. S., at 320.6

The Postal Service cites other provisions that may refer to the Government—namely, the “intervening rights” provisions that offer certain protections for “any person” who is lawfully making or using an invention when the Patent Office modifies an existing patent claim in a way that deems the person’s (previously lawful) use to be infringement. See §§252, 307(b), 318(c), 328(c). The Postal Service argues that the Government must be among those protected by these provisions and from there deduces that it must also be permitted to petition for AIA review proceedings because the review provisions and the intervening-rights provisions were all added to the Patent Act by the AIA at the same time. See Powerex Corp. v. Reliant Energy Services, Inc., 551 U. S. 224, 232 (2007) (invoking the consistent-usage canon where the same term was used in related provisions enacted at the same time).

But regardless of whether the intervening-rights provisions apply to the Government (a separate interpretive question that we have no occasion to answer here), the Postal Service’s chain of inferences overlooks a confounding link: The consistent-usage canon breaks down where Congress uses the same word in a statute in multiple conflicting ways. As noted, that is the case here. In the face of such inconsistency, the mere existence of some Government-inclusive references cannot make the “affirmative showing,” Stevens, 529 U. S., at 781, required to overcome the presumption that Congress did not intend to include the Government among those “person[s]” eligible to petition for AIA review proceedings.7