Zha Daoqiu has filed multiple lawsuits against Zhengzhou Machinery Research Institute (the largest state-owned enterprise in Zhengzhou) by virtue of the invention patent "A Preparation Method of a High Wear-Resistant and Impact-Resistant Roller Skin Liner and Squeeze Roller" (Patent No.: 201611222346.1), triggering a series of patent infringement disputes and posing obstacles to the enterprise's normal operations.
After accepting the commission, Beijing Licheng Intellectual Property Agency faced the unfavorable situation where prior invalidation procedures for the disputed patent had ended in setbacks (handled by other agencies, not ours). We focused on core disputes to advance the patent invalidation declaration work, sorted out the evidence chain of existing technologies, and demonstrated that the disputed patent lacked inventiveness. Ultimately, we successfully secured a ruling that the entire patent right be declared invalid(Decision No. 563705 issued by the China National Intellectual Property Administration).
Unsatisfied with this outcome, Zha Daoqiu filed patent invalidation administrative lawsuits with the Beijing Intellectual Property Court and the Supreme People's Court in succession. Having gone through the rigorous trials of first instance and second instance, Licheng’s legal team made thorough court preparations and presented sufficient evidence and cross-examinations. Both courts fully upheld our arguments and maintained the conclusion that the entire disputed patent be declared invalid in both rounds of proceedings.
This successful verdict has completely negated the legal validity of the disputed patent, fundamentally putting an end to the series of infringement lawsuits, and essentially achieved an "effect of removing the root cause". It has cleared legal obstacles for our client, enabling them to conduct business operations legally and providing solid protection for their legitimate rights and interests.
