17. (1) An industrial design shall be registered by the issue to the applicant of a registration certificate containing(a) the number of the design in order of registration; (b) the name and address of the registered owner and, if that address is outside Nigeria, an address for service it, Nigeria; (c) the date of the application and of the issue of the registration certificate; (d) if foreign priority is claimed(i) an indication of the fact, and (ii) the number and date of the application on which the claim is based and the name of the country where the application was made; (e) a reproduction or representation of the design and an indication of the kind (or, where a classification has been prescribed, the class} of products for which it will be used; and (f) where appropriate, the name and address of the true creator. (2) The Registrar shall maintain a Register of Industrial Designs which shall consist of duplicates of the registration certificates issued under subsection (1) of this section, together with such further matter as is required by this Act to be registered. (2) As soon as may be after a design has been registered under subsection (1) of this section, the Registrar shall cause to be published(a) a notification of the registration containing the details mentioned in paragraphs (a) to (f) of that subsection; or (b) if a summary form of notification is prescribed, a notification in that form. 18. (1) An applicant for the registration of an industrial design may ask for the design to be kept secret for a specified period not exceeding twelve months from the date of the application; and, where he does so, then, notwithstanding any other provision of this Act(a) the specimen and other matters mentioned in section 15(1)(a)(iii) and (iv) of this Act shall be enclosed in a sealed package, which shall be opened by the Registrar(i) when the specified period as elapsed, or (ii) if, before the specified period has elapsed, the applicant asks for the application to be converted into an open application, or (iii) if the package is still sealed, at the expiration of twelve months after the date of the application, (b) a provisional registration certificate shall be issued and a provisional notification published under section 17 of this Act, each of which shall exclude the reproduction and other matters mentioned in section 17(1)(e) of this Act; (c) the said provisional registration certificate and provisional notification shall not confer any right to protection under section 25 of this Act; and (d) when the sealed package has been opened pursuant to paragraph (a) of this subsection, the Registrar shall proceed in accordance with sections 16 and 17 of this Act in so far as he has not already done so and, if authorised by those sections, shall issue a revised registration certificate and publish a revised notification which shall have the same effect as any other certificate issued or notification published under section 17 of this Act.