On August 4, 2021, the CNIPA issued No. 51293 Invalidation Decision, announcing that all rights of the patent owned by Inventronics (Hangzhou) Co., Ltd. entitled "multi-resonant circuit suitable for precise constant current driving of multiple LEDs" were invalid.

After accepting the client's entrustment, the team of Hengbo had done a lot of painstaking work and finally successfully invalidate the patent. 

According to the law, if the patentee disagrees with the invalidation decision, he or she can file an administrative litigation to the Beijing Intellectual Property Court within 3 months.