37 CFR 1.110: Inventorship and date of invention of the subject matter of individual claims

Taken from the Ninth Edition of the MPEP, Revision 07.2015, Last Revised in November 2015

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1.110    Inventorship and date of invention of the subject matter of individual claims.

When one or more joint inventors are named in an application or patent, the Office may require an applicant or patentee to identify the inventorship and ownership or obligation to assign ownership, of each claimed invention on its effective filing date (as defined in § 1.109 ) or on its date of invention, as applicable, when necessary for purposes of an Office proceeding. The Office may also require an applicant or patentee to identify the invention dates of the subject matter of each claim when necessary for purposes of an Office proceeding.

[50 FR 9381, Mar. 7, 1985, effective date May 8, 1985; revised, 61 FR 42790, Aug. 19, 1996, effective Sept. 23, 1996; revised, 72 FR 46716, Aug. 21, 2007 (implementation enjoined and never became effective); revised, 74 FR 52686, Oct. 14, 2009, effective Oct. 14, 2009 (to remove changes made by the final rules in 72 FR 46716 from the CFR); revised, 78 FR 11024, Feb. 14, 2013, effective Mar. 16, 2013]