In 2020 Canon already received a positive result but the defendants filed appeals which the Supreme Court now rejected and upheld the first instance judgement.
Canon Inc. announced the conclusion of a patent infringement dispute with Jiu Zhou China Eternal Office Equipment (Beijing) Co., Ltd., Beijing Century China Eternal Office Equipment Operation Department, Beijing China Eternal Copying Equipment Group Co., Ltd., and Zhongshan Tiantong Printer Consumables Co., Ltd., before Beijing Intellectual Property Court of China, concerning toner cartridges sold for use in various models of HP laser beam printers.
In September of 2017, Canon filed a lawsuit against Jiu Zhou China Eternal Office Equipment (Beijing) Co., Ltd., Beijing Century China Eternal Office Equipment Operation Department and Beijing China Eternal Copying Equipment Group Co., Ltd. for infringement of Chinese invention patent no. ZL200880003520.0 owned by Canon based mainly on their manufacturing and selling of CE310A, CE311A, CE312A, CE313A, CF350A, CF351A, CF352A and CF353A toner cartridges. In May 2020, Canon added Zhongshan Tiantong Printer Consumables Co., Ltd. as an additional defendant for infringement of the same Chinese invention patent based mainly on its manufacturing and selling of the same toner cartridges
In July of 2020, Beijing Intellectual Property Court made a judgement in favour of Canon, which finds these toner cartridges infringe the Chinese invention patent No. ZL200880003520.0 and orders the four defendants to stop infringement upon the patent and compensate Canon for damages.
The defendants filed appeals against the first instance judgement of the Beijing Intellectual Property Court to the Supreme Court. The Supreme Court issued its second instance judgement to uphold the first instance judgement on November 10, 2021. The second instance judgement is the effective final judgement.
