The petitioner, a company limited, has requested invalidation of a utility model patent “three-layer flip-flow screen” of a Tianjin technology company.

Uni-Intel was authorized to represent the patentee to handle this case, and finally the SIPO issued a Decision of Request for Invalidation No. 25342, announcing full validity of the patent right.

The key point of the decision by the patent reexamination board lies in: if the technical solution of a claim has substantial distinguishing feature(s) compared with the prior art, then its novelty will not be affected; if the technical solution of a claim has distinguishing feature(s) compared with the prior art closest to the present application, and the prior art does not provide any enlightenment on adopting the distinguishing feature(s) so as to solve the technical problem, meanwhile the technical solution defined by the claim can provide beneficial effects, then the claim involves an inventive step.