Invalidity Search / Validity Search
Challenging Patent Claims Through Prior Art Evidence
Identify prior art and assess patent validity
Prior-art evidence to evaluate the validity or enforceability of patent claims
IIPRD provides patent invalidity search and analysis for patent owners, law firms, attorneys, litigation teams, and corporate IP departments — combining AI-assisted searching with expert manual review across semantic search, keyword strategies, citation analysis, patent-family analysis, and prosecution-history review, structured as a quick prior-art search or a detailed claim-level invalidity analysis.
Three levels of invalidity search
From a rapid prior-art screen to attorney-ready claim charts with prosecution history — scoped to the stage of your matter and the evidence required.
Quick invalidity search
- Patent publications
- Non-patent literature, where relevant
- Earlier patent-family members
- Closely related technical disclosures
- Cited and citing references
- Brief relevance note per reference
Detailed invalidity search
- Independent and dependent claims
- Claim-limitation mapping
- Multiple prior-art references
- Publication and priority dates
- Patent-family relationships
- Anticipation & obviousness considerations
Comprehensive analysis
- Element-by-element claim charts
- Office Actions & responses
- Examiner & applicant arguments
- Claim amendments & allowance
- Cited prior art & distinctions
- Family prosecution history
AI-assisted & manually reviewed
Invalidity searching needs both search breadth and technical judgment — so machines widen the net and experts decide what actually reads on the claim.
AI-assisted search
AI-enabled tools analyse claims and concepts to surface potentially relevant material:
Manual-reviewed analysis
Patent professionals review each reference for technical relevance and claim correspondence:
AI accelerates discovery
Manual review validates relevance
Claim analysis establishes correspondence
Similarity alone doesn't establish invalidity
A document that merely resembles the patent proves little — so the analysis focuses on the specific limitations of the target claim.
Individual claim elements
Each limitation of the target claim is isolated and its technical requirement identified.
Corresponding disclosure
The disclosure in each prior-art reference that corresponds to a given limitation.
Missing limitations
Limitations that are absent or only partially disclosed — flagged rather than assumed.
Relevant figures & passages
The specific figures and passages that support each mapped correspondence.
Publication dates
Publication and priority dates that determine whether a reference qualifies as prior art.
Reference combinations
Potentially relevant combinations of references for obviousness / inventive-step positions.
Every limitation, mapped to its reference
Claim charts line each limitation of a target claim up against one or more prior-art references and the specific disclosure relied upon.
Gaps shown, not assumed
Where a limitation is not identified in a reference, we mark the gap clearly rather than stretching the disclosure to fit — which is exactly what makes a chart defensible when counsel builds an anticipation or obviousness position.
Ready for:
How the claims reached their granted form
Prosecution records show what prior art the examiner considered and how the applicant characterised the invention — context that shapes a potential invalidity position.
Context around inventiveness
Reviewing the file history reveals which limitations were amended, which distinctions were asserted over cited art, and why the claims were allowed — often the crux of a validity argument.
Records we review, where relevant
Our invalidity search workflow
Nine stages from claim review to a quality-checked, delivery-ready output.
Patent & claim review
We review the target patent, claims, specification, figures, and relevant family members.
Claim deconstruction
The target claims are broken down into individual technical limitations.
AI-assisted search
AI-enabled tools identify potentially relevant prior-art references and expand search concepts.
Manual prior-art search
Professionals search using keywords, classifications, citations, families, inventors, assignees, and technical concepts.
Reference review
Potentially relevant references are reviewed for technical disclosure and publication-date relevance.
Prosecution history review
Where in scope, prosecution records are reviewed to understand claim evolution and inventiveness arguments.
Claim-level mapping
Relevant references are mapped against individual claim limitations.
Claim chart / report preparation
Findings are presented in the agreed delivery format.
Quality review
The analysis is reviewed for technical accuracy, claim correspondence, and completeness.
Output tailored to the stage and purpose
Four report formats, delivered through the analysis approach that fits your matter.
Quick reference report
5–10 closely related prior-art references with concise relevance observations.
Detailed search report
References with claim-level observations, bibliographic data, and technical analysis.
Detailed claim charts
Element-by-element mapping of claims against identified prior-art references.
Prosecution history analysis
Review of prosecution events, amendments, examiner positions, and applicant arguments.
Invalidity searches across complex technologies
Multidisciplinary teams matched to the subject matter of the patent and the prior art.
Semiconductors & Electronics
ICs, semiconductor devices, packaging, sensors, memory, processors, and electronic architectures.
Telecommunications
4G/5G/6G, Wi-Fi, RF, mmWave, networking, wireless systems, and communication protocols.
Software & AI
AI, machine learning, software systems, data processing, cloud technologies, and computer-implemented inventions.
Automotive
ADAS, autonomous driving, connected vehicles, vehicle electronics, sensing, and control systems.
Medical & Life Sciences
Medical devices, diagnostics, biotechnology, pharmaceutical technologies, and healthcare systems.
Mechanical & Industrial
Machines, mechanisms, manufacturing systems, industrial equipment, and engineering technologies.
Chemical & Materials
Chemical compositions, formulations, materials, manufacturing processes, and related technologies.
Energy & Cleantech
Batteries, energy storage, fuel cells, solar and wind systems, EV charging, and smart-grid technologies.
Consumer Electronics & IoT
Wearables, smart-home devices, connected sensors, embedded systems, and IoT platforms.
An extension of your validity team
You keep the legal assessment and strategy — we supply the search breadth, technical analysis, and evidence behind it.
Patent attorneys & law firms
- Quick prior-art searches
- Detailed invalidity searches
- Claim-level analysis
- Claim chart preparation
- Prosecution history review
- Multi-claim analysis
- Multi-patent investigations
- Litigation preparation
- Opposition & validity proceedings
- Licensing & dispute support
Corporate IP teams
- Competitor technologies
- Licensing opportunities
- Patent acquisitions
- Litigation matters
- Product commercialisation
- Patent portfolio review
- Technology transactions
- Freedom-to-operate & risk
Prior art into a clearer validity picture
AI + expert manual review
AI-enabled discovery combined with detailed manual validation by patent professionals.
Three search levels
Quick search, detailed search, or comprehensive analysis — matched to your requirements.
Claim-centric analysis
Focus on individual claim limitations rather than simple document similarity.
Prosecution history review
Understand how claims evolved and how inventiveness was argued during prosecution.
Detailed claim charts
Element-by-element mapping of claims against prior-art references.
Multidisciplinary & global
Technical professionals across all major domains, searching global patent databases and jurisdictions.
Flexible search and analysis, matched to your matter
Whether you need a quick identification of 5–10 closely related references or a detailed claim-level analysis with claim charts and prosecution-history review, our AI-assisted and manually reviewed approach combines search efficiency with expert technical and patent analysis.