About 50search
50search exists because the tools a solo inventor needs to file a provisional in 2026 — prior-art search, draft generation, USPTO forms, deadline tracking — weren't in one place. The options were a $3,000+ attorney-drafted application or a blank Word doc and three weeks of Googling. Both skip the middle.
We ship the middle: $199 for a USPTO-ready provisional draft with spec, claims, abstract, and pre-filled SB/16 + ADS + SB/15A forms. An adversarial-review step flags the claim-scope and §112 issues an examiner is likely to raise. A 1-hour practitioner review before filing — not included, about $250–$500 out-of-pocket — catches the legal-judgment calls AI can't. All-in: ~$500–$765 vs. $2,500–$5,000 for traditional full-service drafting.
What we do
- Free prior-art search. Real calls against USPTO, Google Patents, EPO Espacenet, and Lens.org. An embedding re-rank over the top candidates. A 3-paragraph novelty memo with a composite score. Every memo gets a permanent public URL for the record.
- $199 provisional draft. Claude Sonnet 4.5 writes the spec, claims, and abstract in parallel against your disclosure + the closest prior-art. ZIP output with Word + PDF + USPTO forms, ready to upload at Patent Center.
- $29/mo Pro portfolio. Deadline tracking across every filing you originate. Email reminders at 90 / 60 / 30 / 7 / 1 days out. $50 off each draft.
What we don't do
- Practise law. We are a software tool. Everything we generate is a drafting aid. Before you file, have a registered patent practitioner review your draft. Using this platform does not create an attorney-client relationship.
- Non-provisional applications. Claim-scope strategy for a non-provisional needs human legal judgment AI can't yet provide. When you convert at T+12mo, bring in a practitioner. See the provisional-vs-non-provisional decision guide.
- Foreign filings. The prior-art search covers foreign references (EP, CN, JP) because they affect US patentability. For a PCT or direct foreign filing, work with a registered practitioner in the target jurisdiction.
Who built it
50search is built by an independent inventor team that wanted the tooling it couldn't find when filing its own provisionals. The prior-art engine is the same engine behind patent-engine.dev. The platform is not venture-funded; all revenue goes to hosting + continued development. Reach the team any time via the contact page.
The stack
- Next.js 15 App Router, React 19, TypeScript strict
- Supabase (Postgres + Auth + Storage + RLS)
- Stripe (test mode until launch)
- Anthropic Claude Sonnet 4.5 for spec / claims / abstract / adversarial review
- OpenAI text-embedding-3-small for similarity re-ranking
- Resend for transactional email
- SerpAPI + EPO OPS + Lens.org for prior-art
- Vercel for hosting; Inngest for background jobs
Get in touch
Questions, bugs, feature requests, or security reports — email support@50search.com. Security researchers: see /.well-known/security.txt for the RFC 9116 disclosure policy.