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For questions relating to the USPTO rules related to prior art or what constitute prior art. For REQUESTS FOR PRIOR ART please use the [prior-art-request] tag.

There is one type of question on which to use the tag:

  1. Prior Art Clarification: Questions that are clarifying what constitutes valid prior art (such as Can a YouTube video be submitted as prior art?) or USPTO rules related to prior art.

When requesting prior art for a particular US Patent Application or US Patent please use tag.