Trademark Clearance Searching: What a Knockout Search Can and Cannot Tell You
By Casey Scott McKay ·
A free search of the USPTO database is a screening tool, not clearance, and the difference between the two is measured in six figures. This article explains what a knockout search structurally can and cannot rule out, why a comprehensive search adds state registers, common-law users, business names, domains, and foreign priority filings, and how the DuPont factors turn a pile of search hits into a risk judgment. It works through constructive notice under 15 U.S.C. 1072, why "we had never heard of them" is not a defense, and the willfulness exposure a careless search creates against the good-faith shield a careful one creates under Romag Fasteners and SecuraComm Consulting. It covers the privilege trade-offs in written versus oral opinions of counsel, the recurring fact patterns that trip up sophisticated companies, and the places the law remains genuinely unsettled. A worked example follows a supplement startup that skipped clearance and paid roughly $366,000 to rebrand, and the step-by-step search protocol lives in the companion guide and checklist.
IP and Technology > Trademarks | Article | Published 12 April 2024 - Updated 23 December 2024 | Casey Scott McKay - marksy.us
Summary. A free search of the USPTO database is a screening tool, not clearance, and the difference between the two is measured in six figures. This article explains what a knockout search structurally can and cannot rule out, why a comprehensive search adds state registers, common-law users, business names, domains, and foreign priority filings, and how the DuPont factors supply the analytic frame that turns a pile of search hits into a risk judgment. It works through constructive notice under 15 U.S.C. § 1072 and why "we had never heard of them" is not a defense, then examines the willfulness exposure a careless search creates and the good-faith shield a careful one creates under Romag Fasteners v. Fossil and SecuraComm Consulting v. Securacom. It covers the privilege trade-offs in written versus oral opinions of counsel, the recurring fact patterns that trip up sophisticated companies, and the places the law remains genuinely unsettled. A worked example follows a supplement startup that skipped clearance and paid roughly $366,000 to rebrand. The step-by-step search protocol lives in the companion guide and checklist.
Keywords: trademark clearance · knockout search · comprehensive trademark search · likelihood of confusion · dupont factors · constructive notice · section 1072 · willful infringement · clearance opinion · attorney-client privilege · common law trademark rights · state trademark registers · romag fasteners · trademark search report · rebranding costs · good faith adoption · reverse confusion · uspto trademark search · trademark availability opinion
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