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Patent Invalidity Search

Protect, strengthen, and maximize the value of your patent portfolio through our comprehensive patent invalidity search or patent validity search services.

What is a patent invalidity search?

A patent invalidity search, also called a patent validity search, is a comprehensive examination conducted to determine whether a granted patent is valid. The goal of a patent invalidation search is to uncover prior art that could potentially invalidate one or more claims of the patent in question.

Prior art refers to any evidence that an invention claimed in a patent application was already known or used by others before the claimed invention. It can include published patents, academic papers, product descriptions, and other forms of publicly available information.

Patent invalidation search

A patent invalidation search can be an innovator’s first line of defense against patent infringement claims. Patent owners on the other hand may use a patent validity search to assess the strength of their patents, i.e. the ability to withstand patent challenges either through court litigation or through the PTAB.

Read more on our Patent Invalidity Search Guide.

Patent validity or invalidity search across various stages of the IP lifecycle

Over 5,000 patent search projects completed across patent invalidation, patent due diligence and patent enforcement initiatives.

  • Patent Litigation

    Build defense strategies and strengthen invalidity position against patent infringement claims. Leverage potential prior art to strategize counterclaims and reduce damages and risk exposure.

  • USPTO Post-Grant Proceedings​

    Build strong patent invalidation arguments by uncovering relevant prior art. Strengthen petitions for patent invalidation in PTAB proceedings such as inter partes reviews or post-grant reviews.

  • Patent Stress Test​

    Protect the validity of your patents. Identify potential prior art and gain understanding of its relevance to patent claims to help patent owners prepare effective responses and counterarguments.

    Assess the strength of your patents before engaging in patent enforcement activities.

Expert-led patent invalidity search

Work with a global team of patent experts

Why Parola Analytics?

  • Cost-effective, flexible arrangements

    Customize solutions that suit your requirements, timelines, budget, and easily integrate them with your workflow.

  • Easy-to navigate reports

    Concise, easy-to-navigate patent invalidity search reports and claims mapping charts that provide you with a clear visual presentation of relevant disclosures.

  • Client-focused, collaborative approach

    Communicate directly with our patent experts and research analysts at any point to fine-tune your search.

    Interim reports at the midpoint of the projects to keep you updated and give you opportunities to refine results.


Patent invalidity searches for a top U.S. patent litigation firm

What our clients are saying

Patent Invalidity / Validity Search FAQs

A patent invalidity or patent invalidation search is typically conducted as a defense against patent infringement suits. Its goal is to gather prior art that can be used as evidence to invalidate the claims of the asserted patent or patents. In the U.S., the patent claims can be invalidated either through patent litigation in federal courts or through post-grant proceedings such as inter partes review (IPR) or post-grant review (PGR) before the Patent Trial and Appeal Board (PTAB) at the USPTO

Similarly, a patent validity search can also be conducted in order to assess the strength of the patent. Before a patent owner decides to engage in patent litigation, it is advised to “stress-test” the patent in order to anticipate any potential risks that may be brought upon during any litigation proceedings.

Prior art refers to information that is publicly known before the effective filing date of a U.S. patent application. Prior art may include U.S. and non-U.S. patents and published patent applications, journal and scientific papers, magazine articles, books, product manuals and catalogs, brochures, web pages, conference proceedings and more.

A patent invalidity search report would present all the potential prior art found during the search. In order to assess the degree of relevance, the claims of the asserted patent are mapped against the relevant excerpts of each prior art reference — also called a claims mapping chart.

There are many free and paid databases where you can find patent and non-patent literature:   For more information read our Patent Invalidity Search Guide.

The cost of a patent invalidity search can vary widely depending on several factors such as the complexity of the technology involved, the scope of the search e.g. the number of claims, the jurisdictions where a patent search must be conducted and more.

Generally, patent invalidity searches can range from a few hundred dollars to several thousand dollars or more. It’s essential to consult with a professional patent search firm or a patent attorney to get an accurate estimate tailored to your specific needs and circumstances.

Parola Analytics offers cost-effective, tiered searches that are customized to your search requirements. Send us a message to get a quote.

Get started.

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    1. Parola Analytics and Avontis are distinct entities and operate independently. Any references to Avontis or its services do not constitute a legal partnership. 

    2. Parola Analytics does not provide legal services. Our services are limited to research and technical analysis. Any information provided by Parola Analytics should not be construed as legal advice.