CNIPA Reexamination and Invalidation Department ~ Area ~ Consulting

Protective gear rests amid charred residue and precision mechanical components on a dark workbench during material analysis.

Person Having Ordinary Skill in the Art Notary Public Invalidation Petition

Prior Art Evidence Requirements for Chinese Patent Invalidation

Invalidating a Chinese patent requires foreign prior art to meet strict authentication, certified Chinese translation, and strict timing rules under CNIPA standards.

What the firm knows, published

Expertise is a utility, not a secret. sentiention™ publishes its working knowledge as open reference: intelligence layer covering the materials it sources, the markets it enters, and the reference that serves both.