37 CFR 41.158 - Expert testimony; tests and data.
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(a) Expert testimony that does not disclose the underlying facts or data on which the opinion is based is entitled to little or no weight. Testimony on United States patent law will not be admitted.
(b) If a party relies on a technical test or data from such a test, the party must provide an affidavit explaining:
Title 37 published on 2013-07-01
no entries appear in the Federal Register after this date.