Sealvo
Free trademark search — 15M USPTO records, no account needed
什么是 Sealvo？
The USPTO retired TESS in 2023 but their new search tool still lacks the basics: no prosecution history inline, no owner portfolio, no clean filtering. Sealvo fixes that — search 15M records, see full prosecution history on every mark, filter by status/class/owner, view any owner's entire portfolio. Free. No account. No paywall. Built for founders doing pre-filing clearance and lawyers doing due diligence.
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