Meaning
Administrative adversary proceedings held before patent examination panels allow opposing parties to present oral arguments and contest evidence regarding patent validity. Under Chinese patent administration practice, an invalidation oral hearing provides a formal forum where patent holders and petitioners argue claim scope and statutory grounds for patent invalidation. Panels from the re-examination department of the National Intellectual Property Administration conduct these hearings pursuant to the Patent Law of the People’s Republic of China.
Foreign patent owners must participate through registered Chinese patent attorneys. The hearing provides parties direct opportunity to cross-examine technical witnesses and clarify complex engineering evidence.
Procedural Execution
Panel heads open hearings by establishing the identity of representative patent attorneys and defining contested patent claims. Time limits govern oral presentations and final closing statements from each party. Technical experts may present testimony subject to questioning by panel members and opposing counsel.
Minutes recorded by panel clerks form part of the official administrative record used in subsequent judicial reviews.
Evidence Examination
Evidence submitted prior to statutory deadline windows undergoes physical inspection and cross-examination during the session. Parties challenge the authenticity and relevance of opposing prior art documents, experimental data, or witness affidavits. Documentary evidence originating outside China must satisfy notarization and translation requirements to avoid exclusion.
Panel members question attorneys on technical distinctions between disputed patent claims and cited prior art references.
Determination Effect
Oral hearings conclude without immediate bench rulings, as panels deliberate privately following the close of proceedings. Written invalidation decisions are issued months later, detailing legal rationale and claim construction findings. Decisions sustaining an invalidation petition render affected claims void from their original filing date.
Administrative decisions maintaining patent validity permit patent owners to proceed with judicial infringement enforcement.
