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, EPO, Google Patents, arXiv, 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 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 Naveen Dhillon, a solo inventor who wanted the tooling he couldn't find when filing his 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. The humans.txt file has the full credits list.
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.