Patent protection is an effective protection for products, but it usually does not apply to the brand name itself. Patent holders may prohibit others from producing, using or selling innovations or designs that enjoy patent protection in other countries during the patent term. During the patent protection period, anyone who does not copy the patented innovation or design without the permission of the patent owner, or does not know that the innovation or design is patented, is an infringer as long as they produce, use or sell patented goods in other countries. Once the patent enjoyed by innovation or design expires, anyone has the freedom to produce, use or sell innovation or design. Patent law is the general name of legal norms that confirm the exclusive right of inventors (or their heirs) to their inventions, stipulate the acquisition and extinction of patent rights, the implementation and protection of patent rights, and the rights and obligations of other patentees. Patent, with the meaning of publicity, originally refers to a document with a national seal that can be opened without unpacking.
With the patent certificate issued by the state, the patentee who is granted the patent right enjoys the exclusive right to manufacture, use and sell (including importing patented inventions or designs from some countries) within the time limit prescribed by law. Others must obtain the consent of the patentee to do the above acts, otherwise it is infringement. After the expiration of the patent right, the patent right shall be extinguished. Anyone can use the invention or design for free. It is generally believed that the purpose of the promulgation and implementation of the patent law by the state is to promote the active investment of market resources in a direction conducive to the continuous production of inventions and creations, and to promote the prosperity and development of economic industries. Because of this, the state gives the inventor a monopoly right for a certain period of time through legal procedures.