On June 28, 2023, the China National Intellectual Property Administration Issued the Invalidation Decision No. 561875 , announcing the patent rights of Guangzhou Lango Electronics Technology Co.,Ltd. entitled "Network Sharing Method And Device Of Conference All-In-One Machine And All-In-One Conference Machine" all invalid.

After accepting the client's entrustment, the Hengbo team conducted a lot of arduous searches, and finally successfully invalidated the patent.

The decision held that: If the technical solution of the claim has distinguishing features compared with the reference document that is the closest to the prior art, but the distinguishing features are partly disclosed by another reference document, and both of them play the same role, the rest of the distinguishing features belong to the public common knowledge. If the technical solution of the claim is obvious to those skilled in the art based on the closest prior art combined with another reference document and common knowledge in the field, then the claim does not involve an inventive step.

According to the law, if the patentee refuses to accept the invalidation decision, he can file an administrative lawsuit with the Beijing Intellectual Property Court within three months.