Two additional patents filed by Amazon, published July 2, describe incorporating targeted advertising in on-demand generated content. These patents, filed in Dec. 2007, provide an example for advertising on Kindle.

The patents clearly note that Amazon would insert advertisements throughout the ebooks, from the beginning to the end, between chapters or following every 10 pages, as well as in the margins. A cross-reference feature would add annotations, supplemental reference materials, and illustrations, as well as the ability to print on-demand paper copies in PDF and other format files. Kindle relies on Sprint to download content to the reader.