Signature

51 The PCT request form or, where applicable, the power of attorney must be signed by the applicant.

R. 4.1(d), 4.15, 26.2bis(a), 51bis.1(a)(vi) PCT WIPO PCT Guide 107 - 108

Where there are two or more applicants each applicant must sign the request, or each applicant for whom an agent has been appointed must sign a power of attorney (Box No. IX PCT request form, see point 31). However, if there is more than one applicant the EPO/RO will not invite the applicant to furnish the missing signature(s) if the PCT request form is signed by at least one of the applicants. Any designated Office, however, may require the missing signature of any applicant who has not signed the PCT request for that designated state.

52 If not the applicant but his agent has signed the PCT request form a signed power of attorney or a copy of a general power of attorney need not be submitted since this requirement has been waived by the EPO (see point 32). However, as a matter of strategy and caution agents are recommended to obtain explicit authorisation from all applicants, either by way of direct signature or powers of attorney (see point 29 ff).

R. 90.3, 90.4, 90.5 PCT