A case involving infringement of a utility model patent by xxxx Technology Co., Ltd. and Shenzhen xxxx Information Technology Co., Ltd. 

XXX Technology Co., Ltd. (hereinafter referred to as the "plaintiff") filed a civil lawsuit with the Shenzhen Intermediate People's Court, claiming that Shenzhen XXXX Information Technology Co., Ltd. (hereinafter referred to as the "defendant") infringed upon its utility model patent rights. 

In this case, as the agent representing the defendant, we, based on a thorough understanding of the case details, filed an invalidation request against the plaintiff's utility model patent. After the National Intellectual Property Administration reviewed our invalidation request, it determined that the claims 1-10 of the involved patent did not possess originality and issued the Invalidation Request Review Decision No. 509xx, declaring the entire involved patent invalid. 

Later, the plaintiff submitted an application for withdrawal of the lawsuit to the Shenzhen Intermediate People's Court. The Shenzhen Intermediate People's Court lawfully ruled to grant the withdrawal of the lawsuit, and the case filing fee was borne by the plaintiff. 

(2) Typical Significance 

In this case, the patent involved was declared completely invalid by the Patent Reexamination and Invalidity Review Department. As a result, the plaintiff's basis for filing the lawsuit no longer existed. Even if the plaintiff did not apply for withdrawal of the lawsuit, the defendant could still raise a defense of alleged defect in the patent rights, thereby protecting their own legitimate interests.