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Patent research

Prior art search

Describe your invention and search issued patents and published applications from the United States Patent and Trademark Office (USPTO) and offices worldwide, powered by a live Google Patents query. See what already exists before you spend on a filing.

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Curated results + what to know per field

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What is a prior art search?

Prior art is everything that was publicly available before your filing date: patents, published patent applications, journal articles, products, websites, and more. A patent can only be granted for an invention that is new and non-obvious over that prior art, so searching it first tells you whether an idea is worth pursuing and how to frame claims around what is genuinely new.

  1. 1

    Describe your invention

    Use plain language and the key technical features. Specific keywords find closer results than broad ones.

  2. 2

    Review the closest results

    Persoona ranks patents by overlap with your description and links each to the full document on Google Patents.

  3. 3

    Decide your next step

    If your idea looks distinct, draft a provisional to lock in a date, then have a registered attorney run a professional search.

Prior art search FAQ

What is a prior art search?
A prior art search looks for existing patents, published applications, and other public disclosures that are similar to your idea. It helps you gauge whether an invention is new before you spend time and money on a patent application.
Is Persoona's prior art search free to use?
The preview is open to everyone and shows the top results for your query. Sign in to see the full result list and to draft a United States Patent and Trademark Office (USPTO) provisional package from what you find. No card is required to start.
Does this replace a professional patent search or legal advice?
No. This is a preliminary search of Google Patents to help you get oriented. It is not exhaustive and it is not legal advice. Before you file or rely on the results, have a registered patent attorney run a professional search.
Where do the results come from?
Results come from a live search of Google Patents, which indexes patents and published applications from the United States Patent and Trademark Office (USPTO) and patent offices worldwide. Each result links to the full document so you can read it yourself.
What should I do after a prior art search?
If your idea looks distinct, draft a provisional patent package on Persoona to lock in a filing date, then have a registered patent attorney review it. You can find one in the Persoona patent attorney directory.
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