2 (i) if, before the filing date of the patent application, a patent application has been filed for the same invention or a patent was already issued in or outside Egypt for the invention or part thereof; (ii) if, before the filing date of the patent application, the invention was used publicly in; or outside Egypt, or the description of which was disclosed in a manner so as a person having expertise in the art is able to exploit it. According to the provisions of the preceding Article, disclosure shall not include displaying the invention in national or international exhibitions within the six months before the date on which the application was filed. The Regulations shall specify the conditions and the procedures for the disclosure of a patent. Article 4 Without prejudice to the international conventions in force in Egypt, any natural person or legal entity, Egyptian or foreign, belonging to, domiciled or active in a country or an entity that is a member of the World Trade Organisation or that applies reciprocity to Egypt, shall have the right to apply for a patent at the Egyptian Patent Office, and enjoy whatever rights derived therefrom, in conformity with the provisions of this Law. Nationals of all member countries of the World Trade Organisation shall benefit from any advantage, preference, privi1ege or immunity granted by any other 1aw to nationals of any state in connection with the rights provided for in this Chapter, unless such advantage, preference or immunity derives from: (1) agreements on judicial assistance or agreement on law enforcement of general nature; (2) agreements in connection with the protection of intellectual property rights, which came into force prior to the 1st of January 1995. Artic1e 5 The Patent Office shall establish a special register to record patent applications, utility models and all related data, exploitation and application thereof, in conformity with the provisions of this Law, as set out in its Regulations. Article 6 The right to the patent shall belong to the inventor or his successor in title. If two or more persons have jointly made an invention, the right to the patent shall belong to them jointly and equally, unless they have agreed otherwise. If more than one person have made the same invention independently, the right to the patent shall belong to the person who was first to apply for a patent.