What about being sued for patent infringement?

If someone accuses of patent infringement, the court will serve a copy of the indictment after accepting it. According to the regulations, the defendant must submit the defense within 15 days after receiving the copy of the indictment. During this period, the following work should be done well: immediately hire a patent lawyer or patent agent to read the plaintiff's patent documents and understand the case; Cooperate with the patent agent to collect data and prepare documents, and submit the patent invalidation request to the Patent Office within 15 days; On the one hand, provide evidence of patent invalidation and request the court to suspend the lawsuit according to law; On the other hand, it puts forward defenses and counterclaims against the claims and evidence in the original complaint. Legal basis: Article 872 of the Civil Code of People's Republic of China (PRC). If the licensor fails to license the technology as agreed, it shall return part or all of the royalties and bear the liability for breach of contract. Where a third party is allowed to exploit a patent or use a technical secret beyond the agreed scope in violation of the agreement, it shall stop the breach of contract and bear the liability for breach of contract; Anyone who violates the agreed confidentiality obligation shall bear the liability for breach of contract. Where the transferor is liable for breach of contract, the provisions of the preceding paragraph shall apply mutatis mutandis. Article 873 of the General Principles of the Civil Law of People's Republic of China (PRC), if the licensee fails to pay the royalties as agreed, it shall pay the royalties and liquidated damages as agreed; Those who fail to pay royalties or liquidated damages shall stop exploiting patents or using technical secrets, return technical materials and bear the liability for breach of contract; Where a third party is allowed to exploit a patent or use a technical secret beyond the agreed scope without the consent of the licensor, it shall stop its breach of contract and bear the liability for breach of contract; Anyone who violates the agreed confidentiality obligation shall bear the liability for breach of contract. The transferee shall bear the liability for breach of contract with reference to the provisions of the preceding paragraph.