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A patent holder that went after podcasters in 2013 has lost its appeal before the Federal Circuit. In 2015, the Electronic Frontier Foundation successfully petitioned the US Patent and Trademark Office to invalidate parts of Personal Audio, LLC’s patent, arguing that they were not the first to invent a “system for disseminating media content representing episodes in a serialized sequence.”

The “podcasting patent” is one of five patents that Personal Audio, LLC wields in lawsuits. The patents seem to frequently cover “inventions” that most people understand to be fairly basic aspects of technological services, and yet Personal Audio has been successful in using its patent portfolio to extract large judgments in the past. For example, in…

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