When it comes to joint inventors signing affidavits or declarations, MPEP 717.01(c) provides specific guidance: ‘Where the affidavit or declaration is filed under 37 CFR 1.130(a) or (b), 37 CFR 1.131(a), or 37 CFR 1.132 for purposes of establishing an inventorship date, it is not necessary for all joint inventors to sign the affidavit or…

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