Perfect 10, Inc. v. Amazon.com, Inc.

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Perfect 10, Inc. v. Amazon.com, Inc. was a U.S. Ninth Circuit case about whether Google's image search thumbnails and linking to Perfect 10's images violated copyright.

Background
- Perfect 10, an adult magazine, sued Google (and later Amazon) over image search practices. Google crawled and cached many sites that hosted Perfect 10’s images and showed thumbnail previews in its image search. When users clicked a thumbnail, they were taken to the original site with an inline frame showing the image and the thumbnail.
- Perfect 10 argued this violated its copyrights. Google said the thumbnails were fair use and the links and frames did not infringe.

District court ruling
- The district court granted partial injunctions: Google’s thumbnail images were likely infringing, but the hyperlinks to infringing sites were not.
- For framing, the court used a “server test”: infringement would require Google to host or transmit the content itself. Since Google only linked to content on other servers, the court found no direct infringement for framing.
- For thumbnails, the court found Google’s use was commercial and only slightly transformative, weighing in favor of Perfect 10. It concluded that the use of thumbnails was not fair use.

Ninth Circuit ruling
- The Ninth Circuit affirmed most of the district court’s framework but reversed on the thumbnail issue. It held that Google’s thumbnail images were highly transformative and thus protected by fair use, so displaying thumbnails did not infringe Perfect 10’s rights.
- The court also upheld the district court’s ruling that hyperlinks and framing do not by themselves infringe, since they simply link to third-party content and do not host or copy the works.
- The court found that Google did not contribute to or profit from infringement in a way that would make it liable for contributory or vicarious infringement. The existence of infringing sites elsewhere and Google’s lack of control over them meant no liability for Google’s actions.
- The Ninth Circuit did not decide the Digital Millennium Copyright Act (DMCA) safe-harbor issue for hyperlinks, noting that Perfect 10’s likelihood of success on other claims made it unnecessary to resolve that defense.

Impact
- This decision helped establish that thumbnail previews in image search can be fair use if they’re highly transformative and serve a different purpose (information retrieval) than the original works.
- It also reinforced that merely linking to infringing sites or framing them without hosting the content does not automatically amount to copyright infringement.
- The case is often cited for the “server test” approach to framing and for recognizing the public benefit of search engine technology.