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Latin for "on its face." Sufficient evidence to raise a presumption of fact, unless rebutted. MPEP 2001
- Browse Related Terms: applicant, Completion of Invention, conception, Corroboration, Diligence, First to Invent, Indefiniteness, Inventor, Joint, Joint Invention, Non-Obviousness, Prima facie, Reduction to Practice, Actual, Reduction to Practice, Constructive, unpatentable, valid
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