Comprehensive Clearance Search Guide

What "Comprehensive" Means

A comprehensive clearance search examines every category of source where a conflicting trademark might exist. The USPTO defines three: federal, state, and common law. A search covering only one or two categories leaves gaps that can result in costly surprises.

Federal Register Search

Live registrations, pending applications, and dead marks searched with phonetic, visual, and semantic matching. Dead marks are included because a dead registration does not necessarily mean the mark is no longer in use.

State Register Search

Each of the 50 states maintains its own register. State registrations are enforceable within the state and can create complications for a federal applicant.

Common Law Search

Business entity filings, domain names, social media, and web use. Common law rights arise from use in commerce and can be senior to a subsequent federal registration if the use predates the filing.

Attorney Analysis

A comprehensive search generates data. Turning it into actionable intelligence requires evaluating each conflict against the DuPont factors. This analysis distinguishes professional searches from raw database outputs.

After the Search

If clear: proceed to file with confidence. If conflicts identified: the opinion letter explains options — modify the mark, narrow goods, seek consent, or choose a different mark.