Article 25
Recording of Acts
in the Special Register of Patents
Subject to the provisions of Articles 33 and 35 below, the Administrative Council shall
draw up regulations concerning the acts to be recorded in the Special Register of Patents, on
pain of their not being enforceable against third parties.
Section III
Certificates of Addition
Article 26
Right to Certificates of Addition
(1) The patentee or entitled persons shall, for the entire duration of the patent, have the
right to make changes, improvements or additions to the invention, complying, for the filing
of the application, with the formalities laid down in Articles 14, 15, 16 and 17 of this Annex.
(2) Such changes, improvements or additions shall be recorded in certificates granted in
the same form as the principal patent which, as from the dates of application and grant
respectively, shall have the same effects as the said principal patent.
(3) Certificates of addition taken out by one of the entitled persons shall benefit all the
others.
Article 27
Duration
Certificates of addition shall terminate with the principal patent. However, invalidation
of the principal patent shall not invalidate as of right the corresponding certificate or
certificates of addition, and, even where absolute invalidity has been declared under the
provisions of Article 43(3), the certificate or certificates of addition may survive the principal
patent until the normal term of the latter expires, subject to continued payment of the annual
fees that would have been payable had the said patent not been invalidated.
Article 28
Conversion of an Application
for a Certificate of Addition
into a Patent Application
Provided that a certificate of addition has not been granted, the applicant may effect the
conversion of his application for a certificate of addition into a patent application, for which
the filing date shall be the date of application for the certificate. Any patent eventually
granted shall then give rise to payment of the same annual fees as a patent filed on the latter
date.