GA C4.1.15 4.1.15.

Who has to sign the demand? 
4.1.053
The demand must be signed by the applicant or, if there is more than one applicant, by all applicants. If the signature of one or more applicants is missing, the EPO as IPEA will not invite the applicant(s) to furnish the missing signature(s) provided that at least one of the applicants has signed the demand (see point 4.1.066).
R. 53.2(b), 53.8, 60.1(a-ter), 90.3 PCT
WIPO PCT Guide 10.031-10.032 
4.1.054
A (common) agent or common representative may sign the demand on behalf of the applicant(s) who appointed him (see points 2.9.009 ff).
4.1.055
Where the demand is signed by a (common) agent the EPO as IPEA will not invite the applicant(s) to file a (separate) power of attorney - if not already on file - or a copy of a general power of attorney since the EPO has waived these requirements (see points 2.9.014 ff).
R. 90.4, 90.5 PCT
OJ 2010, 335

Source: http://www.epo.org/applying/international/guide-for-applicants/html/e/ga_c4_1_15.html

Date retrieved: 17 May 2021

8 references found.

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EPO Guide for Applicants, part II Int.

EPO Guide for Applicants, part II Int. - C The EPO as ISA and SISA

PCT Implementing Rules