Recently, YiJu and Sunshine IP jointly represented the patentee KOKUYO in successfully closing the patent invalidation case vs. the petitioner PLUS Stationery Shanghai Co., Ltd. PLUS Stationery Shanghai Co., Ltd. withdrew its request for invalidation of the invention patent "Cutting Knife" (ZL200810086335.4").
The key to the case lies in the issue whether prior art is subject to the technical problems to be solved by the patent in question when the cutting tool with a different structure is adopted as the closest prior art, and the issue whether the corresponding technical solutions are available to solve such technical problems. During the trial, we demonstrated the distinctions of the cutting tool to the parties present through physical demonstrations and PowerPoint, which ultimately made the petitioner withdraw its request for invalidation.
YiJu has more than 30 full-time intellectual property lawyers and patent litigators, and have handled more than 2,000 litigation cases relating to patent invalidation, infringement litigation, administrative litigation infringement and trademark litigation, etc., with a total success rate of over 90%, including many cases with social impact, e.g., CSPC levamlodipine patent dispute, Gree vs. Aux patent invalidation case, Mobike patent invalidation case, Hong Kong-Zhuhai-Macao Bridge patent invalidation case, Tencent "Wesee" trademark administrative litigation, Zhongshan Yunteng trademark infringement litigation, Liebherr trademark administrative litigation, Zhoukou "Changshoushan" trademark administrative litigation, patent inventor qualification dispute related to Beijing Olympic "Giant Footprint" launcher, Lertech patent ownership dispute, SJ Environmental Protection unfair competition litigation, U.S. CBI trade secret litigation, etc. For each and every patent dispute litigation case, YiJu establishes, on a case-by-case basis, a panel consisting of legal experts, technical experts, senior patent agents and senior agents at law to analyze and handle the case in all aspects, which is also the consistent service style of the litigation and invalid team of YiJu Law Firm.