Question
Which of the following is NOT a requirement for patent eligibility?A. Novel.B. Revolutionary.C. Non-obvious.D. Useful.
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Evidence boundary
The keyword “patent” is not a complete question, so this page transparently answers a representative OpenStax assessment item selected under the SOP. It summarizes general U.S. utility-patent concepts, preserves the distinction between subject-matter eligibility and broader patentability, and is not legal advice for any application or dispute.