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I am working on a research project where, for a given number of patents (there are many) we would like to find licensing revenue information. Where can I find licensing information on patents? Are there any 3rd party vendors (similar to Derwent or Orbits Questel) that provide this information? Or, perhaps there may be open source databases?

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    I fear such information is not generally publicly available. I don't think there is any legal reason that an assignee needs to publicly disclose those who have taken license to a patent. Perhaps for patents associated with technical standards there might be info. – Eric Shain Jul 28 at 17:20

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