Briefly describe the rules of Paris Convention on compulsory licensing.

A: (1) Objects that can be granted compulsory license. Mainly patents, followed by utility models. As for the design, the convention stipulates that under no circumstances can it be cancelled for reasons such as non-implementation. As for whether compulsory license can be granted because it is not implemented, it is free for countries to stipulate.

(2) Reasons for granting compulsory license. According to the Paris Convention, compulsory license is granted to prevent the abuse of patent right. The specific reasons mentioned are "non-implementation" of patents and "insufficient implementation" of patents. Member States are free to define the meaning of "implementation". Generally speaking, it refers to the implementation of patents in industry, that is, the manufacture of patented products or the use of patented methods. Importing or selling patented products and products manufactured according to patented methods are generally not considered as "implementing" patents. If the patentee refuses to grant a license on reasonable terms, even though he has already implemented the patent in the relevant country, which hinders the industrial development, there is not enough patented products to supply the market in that country, or the product price is too high, it is an abuse of the patent right. In addition, since the Paris Convention does not prohibit the granting of compulsory licenses under other circumstances, member States are free to decide to take similar measures when the public interest requires it.

(3) Conditions for granting a compulsory license. The first is the relationship between compulsory license and patent revocation. In the case of patent abuse, unless compulsory license is not enough to prevent abuse, patent revocation should not be stipulated, that is, compulsory license is a prerequisite for patent revocation; In addition, before the expiration of two years from the date of granting the first compulsory license, no lawsuit may be filed to cancel or revoke the patent. The second is the conditions for granting the compulsory license itself, including: (1) The application for compulsory license can only be filed after 4 years from the date of patent application or 3 years from the date of patent grant, whichever is later; (2) Not implementing or not fully implementing the patent without justifiable reasons; (3) The compulsory license granted is a non-exclusive license (general license) and may not be transferred or sub-licensed, unless some enterprises or goodwill using the license are transferred together.