Amazon vs. Perplexity – U.S. Court of Appeals for the Ninth Circuit

The U.S. Court of Appeals for the Ninth Circuit has ruled in the case of Amazon vs. Perplexity, with the court affirming a lower court's decision that Amazon's use of a machine learning model did not infringe on Perplexity's patent. Perplexity had claimed that Amazon's model infringed on its patent for a 'natural language processing system' but the court found that Amazon's model was not covered by the patent. The court also held that Amazon's use of the model was exempt from liability under the 'fair use' doctrine. Perplexity had argued that Amazon's model was a 'derivative work' of its own technology, but the court disagreed. The case has significant implications for the use of AI and machine learning in business and the boundaries of intellectual property law.