Cluster Searching


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Find game-changing patents missed by other tools

  • Simply input a starting list of relevant patents - any family member will do
  • Results are delivered in seconds and ranked by similarity for easy review
  • Great for patentability, novelty, examination or licensing searching - and so easy to use, it can be used at the start and finish of every patent search






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Explore the patent landscape

  • Understand how patents cluster together over similar claims.
  • Discover unusual ways of describing prior art.
  • Similarity and patent scoring let you prioritize.
  • Potential infringements are clearly highlighted.
  • Systematically work your way through the patent landscape



What does Ambercite do?

Finds you patents missed by other search tools - quickly and easily

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Dr Patrick Daum, M.Sc., B.Sc, European Patent Attorney

Ambercite is a leap forward in efficiency and organization. I work very fast, through a number of patents, with this platform, and it has significantly improved my patent research workflow. It allows me to visualize and catalog prior art in a way that is intuitive and more closely resembles my mental map. Thank you for giving me the gift of time, and freeing me up to focus on the surgical and medical treatment of women's cancer, and the research and innovations we are aggressively pursuing.

Mark Hunter, M.D.,Director of Gynecologic Oncology, Ellis Fischel Cancer Center


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Viva la Difference - how Cluster Searching differs from conventional searching (July 2015 update)

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This is an update of a blog first published in August 2014. Since then our terminology has changed from Automated Search Reports to online Cluster Searching but the results below would still apply. 



In recent blogs Ambercite has been promoting our newly developed 'Automated Search Reports'. (Now 'Cluster Searching', which will be the term used for the rest of this blog). We have also produced a number of reports for commercial clients, and speaking to a number of thought leaders in the world of patent searching and analysis about how the algorithms used in these reports differ from the processes used in other search processes. And in doing so, we hear this question a lot:

How do the results differ? Do you learn anything new with Cluster Searching? 

This led Tony Trippe of Patinformatics to propose a trial to directly compare the results of an Cluster Search to a conventional search. Ambercite is closely aligned with Australian IP law firm Griffith Hack, who run a comprehensive search department. So we asked a professional patent searcher to

  1. Take a patent that somebody might want to invalidate
  2. Run a conventional search process on this patent
  3. Report on the relevance of each patent found using this process

In the meantime, we ran one of our Cluster Searches on the same patent, and then the professional searcher would also rate these patents. In this case, the Cluster Searchi comprised of  the 10 most similar direct (known) backward citations combined with 59 not-cited prior art patents, or 69 patents in total (Categories D + E in the Trippe blog)

And what did we find? Tony's blog contains the full answers to this, but some key results are shown below.


How relevant were the patents found by these two techniques ?

Searcher assessment of relevance of patents found


Standard keyword search (595 patents found)


Cluster Search for 10 closest combined with 59 indirect prior art patents (69 patents in total)



47 (8%)

9 (13%)

Potentially relevant

128 (21%)

20 (29%)

Not relevant

418 (70%)

41 (59%)


So in other words, the 69 patents found by the Cluster Searching had a higher percentage of relevance (13% vs 8%) than the 595 patents found by the conventional patent search.

There is another term for "% relevance" that is sometimes used in statistics, and that is "precision". Or in other words, this trial showed that the 69 patents found in the Cluster Search had a higher precision than the 595 patents found in the conventional search. 


What was the overlap?

Just 9 patents were found in both the conventional patent search (595 patents in total)  and the Cluster Search (69 patent in total).

Both of the above results are shown in the image below.



Take home lesson

If you want to find all of the relevant prior art for a given patent, you should use both conventional patent searching and our Cluster Searching


Want to know more?

Ambercite offers free and completely confidential two week trials to Cluster Searching - please contact us to arrange a demonstration and trial. Testimonials for Cluster Searching are found here, including:

"Ambercite Clustering has managed to create a tool to enhance chemical patent due diligence in a remarkable way…revealing art which may cover compounds in discovery within claims of a generic scope.  Congratulations!" - Patent Analyst, global pharmaceutical company, USA

Rate this blog entry:

Mike first developed an interest in patent data when working as a research scientist, and deepened this interest when working as an IP manager which led to his role at Griffith Hack. Mike has published in the areas of chemical engineering, patent management, the value of patents and the use of patent data in in a wide range of publications and forums, including the international journals Les Nouvelles, and Managing Intellectual Property.

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