(a) Applicants of international applications may be represented by attorneys or agents
registered to practice before the United States Patent and Trademark Office or by
an applicant appointed as a common representative (PCT Art. 49, Rules 4.8 and 90 and
§ 11.9). If applicants have not appointed an attorney or agent or one of the applicants to
represent them, and there is more than one applicant, the applicant first named in
the request and who is entitled to file in the U.S. Receiving Office shall be considered
to be the common representative of all the applicants. An attorney or agent having the right to practice before a national office with
which an international application is filed and for which the United States is an
International Searching Authority or International Preliminary Examining Authority
may be appointed to represent the applicants in the international application before
that authority. An attorney or agent may appoint an associate attorney or agent who shall also then
be of record (PCT Rule 90.1(d)). The appointment of an attorney or agent, or of a common representative, revokes
any earlier appointment unless otherwise indicated (PCT Rule 90.6 (b) and (c)).
(b) Appointment of an agent, attorney or common representative (PCT Rule 4.8) must be
effected either in the Request form, signed by applicant, in the Demand form, signed
by applicant, or in a separate power of attorney submitted either to the United States
Receiving Office or to the International Bureau.
(c) Powers of attorney and revocations thereof should be submitted to the United States
Receiving Office until the issuance of the international search report.
(d) The addressee for correspondence will be as indicated in section 108 of the Administrative
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