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Rule 11 of the Federal Rules of Civil Procedure requires an attorney to conduct a reasonable inquiry into the laws and facts before filing a pleading in a court and to certify that the claims contained in the pleading are not frivolous, legally unreasonable, without factual foundation or asserted for improper purposes. This inquiry must be undertaken before the suit is filed, not after. The question is, “What is a reasonable inquiry into the facts and law in a patent case?”