The USPTO OCE - Patent Litigation Cases API provides access to detailed data on 74,623 unique patent litigation district court cases filed from 1963 to 2015. This data was collected from Public Access to Court Electronics Records (PACER) and RECAP. This API is provided by the United States Patent and Trademark Office (USPTO) as part of their Open Data Portal.
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So far, we don't have a record of any changes to this API