republic-os/legal/us/code/title-35/chapter-25/section-256.md

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LegalText	35 U.S.C. § 256	Correction of named inventor	us	united_states_code	code_section	35	PATENTS	25	AMENDMENT AND CORRECTION OF PATENTS	256	35 U.S.C. § 256	current	119-100	2026-06-26	official	https://uscode.house.gov/download/releasepoints/us/pl/119/100/xml_usc35@119-100.zip	/us/usc/t35/s256	data/legal/raw/us/code/title-35/usc35.xml	683f65af9cf22682d1378ebd2c0f2a7c062b287ecfcccef0b48221a1c83249bb	736cab508592dcf50013a1aed5ab108f72fd8493e76afc46848cdc35da38bbe3	af17ce2bb204be8c0be2c82f2e6a4cc07b71b1a808863544ee74823424219f6f	2026-07-04	official	legal us-code

35 U.S.C. § 256 - Correction of named inventor

Text

(a) Correction.— Whenever through error a person is named in an issued patent as the inventor, or through error an inventor is not named in an issued patent, the Director may, on application of all the parties and assignees, with proof of the facts and such other requirements as may be imposed, issue a certificate correcting such error.

(b) Patent Valid if Error Corrected.— The error of omitting inventors or naming persons who are not inventors shall not invalidate the patent in which such error occurred if it can be corrected as provided in this section. The court before which such matter is called in question may order correction of the patent on notice and hearing of all parties concerned and the Director shall issue a certificate accordingly.

(July 19, 1952, ch. 950, 66 Stat. 810; Pub. L. 97–247, § 6(b), Aug. 27, 1982, 96 Stat. 320; Pub. L. 106–113, div. B, § 1000(a)(9) [title IV, § 4732(a)(10)(A)], Nov. 29, 1999, 113 Stat. 1536, 1501A–582; Pub. L. 107–273, div. C, title III, § 13206(b)(1)(B), Nov. 2, 2002, 116 Stat. 1906; Pub. L. 112–29, § 20(f), Sept. 16, 2011, 125 Stat. 334.)

Notes

Historical and Revision NotesThis section is new and is companion to section 116. The first two paragraphs provide for the correction of the inadvertent joining or nonjoining of a person as a joint inventor. The third paragraph provides that a patent shall not be invalid for such cause, and also provides that a court may order correction of a patent; the two sentences of this paragraph are independent.

Editorial Notes

Amendments2011—Pub. L. 112–29 designated first and second pars. as subsecs. (a) and (b), respectively, inserted headings, and, in subsec. (a), struck out “and such error arose without any deceptive intention on his part” after “not named in an issued patent”. 2002—Pub. L. 107–273 made technical correction to directory language of Pub. L. 106–113. See 1999 Amendment note below. 1999—Pub. L. 106–113, as amended by Pub. L. 107–273, substituted “Director” for “Commissioner” in two places. 1982—Pub. L. 97–247 substituted “Correction of named inventor” for “Misjoinder of inventor” as section catchline and, in text, substituted “Whenever through error a person is named in an issued patent as the inventor, or through error an inventor is not named in an issued patent and such error arose without any deceptive intention on his part, the Commissioner may, on application of all the parties and assignees, with proof of the facts and such other requirements as may be imposed, issue a certificate correcting such error” for “Whenever a patent is issued on the application of persons as joint inventors and it appears that one of such persons was not in fact a joint inventor, and that he was included as a joint inventor by error and without any deceptive intention, the Commissioner may, on application of all the parties and assignees, with proof of the facts and such other requirements as may be imposed, issue a certificate deleting the name of the erroneously joined person from the patent”, substituted “The error of omitting inventors or naming persons who are not inventors shall not invalidate the patent in which such error occurred if it can be corrected as provided in this section” for “Whenever a patent is issued and it appears that a person was a joint inventor, but was omitted by error and without deceptive intention on his part, the Commissioner may, on application of all the parties and assignees, with proof of the facts and such other requirements as may be imposed, issue a certificate adding his name to the patent as a joint inventor”, and struck out provision that the misjoinder or nonjoinder of joint inventors not invalidate a patent, if such error could be corrected as provided in this section.

Statutory Notes and Related Subsidiaries

Effective Date of 2011 AmendmentAmendment by Pub. L. 112–29 effective upon the expiration of the 1-year period beginning on Sept. 16, 2011, and applicable to proceedings commenced on or after that effective date, see section 20(l) of Pub. L. 112–29, set out as a note under section 2 of this title.

Effective Date of 1999 AmendmentAmendment by Pub. L. 106–113 effective 4 months after Nov. 29, 1999, see section 1000(a)(9) [title IV, § 4731] of Pub. L. 106–113, set out as a note under section 1 of this title.

Effective Date of 1982 AmendmentAmendment by Pub. L. 97–247 effective six months after Aug. 27, 1982, see section 17(c) of Pub. L. 97–247, set out as an Effective Date note under section 294 of this title.