An invalidation/invalidity or opposition search is a focused prior art search to identify patent and non-patent documents that were publicly available before the effective filing date or priority date which may impact the claims of a specific patent. The goal of Patent Invalidation is to invalidate or revoke patent claims that have previously been registered or issued by identifying relevant prior arts that the examiner overlooked. Invalidity searches focus on the claim’s language rather than the invention’s general concept and idea.