A prior-art search service for R&D teams, IP departments and patent firms

AI-powered prior-art search and examination simulation.

Patents written by AI, examined by Patentforest.

Organized in the same X / Y / A categories as an International Search Report (ISR).

▶ Try it free

Our vision

In the AI era, the question is what you want to do.
Patentforest helps you create real value.

Algorithm

High-performance examination algorithm

All PCT ISR X claims matched; 94% agreement overall

100%

Agreement on ISR X claims (42/42)

70%

Agreement on ISR Y/A claims (7/10)

94%

Overall agreement (49/52)

* Y/A accuracy continues to improve through revised combination logic and an expanded common-general-knowledge (CGK) library. Results may contain errors.
Internal study.

Services

Three services, three starting points

Start from claims or a specification, a goal or a product spec.

VerifyValidation

Examination simulation

Just enter claims or a specification, and results are organized in the same X / Y / A categories as an International Search Report (ISR).

  • Element breakdownExtracts the elements of your claims or specification automatically
  • Prior-art search80% of ISR-cited documents appear in the top 50 results (internal study)
  • MappingShows where your technology sits on a patent map
  • Overlap checkScores the overlap for each element, taking into account physical and scientific necessity and conceptual inclusion
  • Leap checkScores the leap from combinations of documents
  • X / Y / A categoriesOrganized in the same X / Y / A categories as an International Search Report (ISR)
  • Technical search reportShows elements, analysis and prior art in 3 columns
  • Next stepsFeed results back to inventors or claim-drafting AI (Patentforest does not draft claims or responses.)
SeedIdeation
Coming soon

Seed ideas

Just enter what you want to do, and Seed draws on 5 other fields to shape it into a new idea.

  • Goal inputEnter the problem you want to solve
  • Field selectionLet Seed choose 5 other fields, or pick them from CPC technology areas
  • Element extractionExtracts elements from the top patents in each field
  • Idea generationAI combines elements from other fields into several idea options
  • To VerifySend the chosen idea straight to examination simulation
ClearPreliminary clearance search
Coming soon

Check third-party patents before you launch

Enter your product spec, and Clear lists the elements of similar third-party patents, organized in X / A categories.

  • Element breakdownBreaks the product spec into elements.
  • Patent searchSearches third-party patents at the element level.
  • MappingMaps the elements of your product against those of third-party patents.
  • Similarity listLists the third-party patents with similar elements.
  • X / A simulationOrganizes the similar patents in X / A categories. Clear does not judge infringement.

Confidentiality

Security you can rely on

Designed for unfiled inventions

Confidentiality

  • Runs on AWS, Tokyo region
  • Claude and OpenAI APIs used under Zero Data Retention: inputs and outputs are neither stored nor used for training
  • Inventions are not written to logs
  • Results are deleted 30 minutes after processing
  • Partnership with a security provider

FAQ

Frequently asked questions

Can Patentforest judge novelty and inventive step, or give a patent opinion?
No. Patentforest does not judge novelty or inventive step, and does not give patent opinions. Use the overlap score as input when considering novelty, and the leap score when considering inventive step. For a judgment or opinion, please consult a patent attorney.
What is the examination simulation?
Each element of your claims or specification is compared with prior art, overlap and leap are scored, and results are organized in the same X / Y / A categories as an International Search Report (ISR). It does not guarantee the outcome of an actual examination.
COMING SOON

Launching Dec 2026

Free trial sign-ups open soon.

Plan

SaaS

Use it right in the browser. Enter a claim and get search, analysis and a report.

Plan

On-premises

Runs on your own servers. Extend the technical library (dictionary) and analysis rules for your domains.

Ask about the free trial

Contact: Shiro Tanaka · info@patentforest.com