# James D. Barnes — Patents explained on PatentBrief

James D. Barnes has 1 landmark patent explained in plain English on PatentBrief.

- [How Phones Store and Rotate Ads Locally by Breaking Rules](https://patentbrief.org/patent/us/8423408/amazon-advertising) — granted 2013
  Sprint's 2006 patent on a system that downloads a pool of ads to a phone and uses an on-device manager to decide which ad to show, even breaking its own rules to make sure lagging ad campaigns get seen.

**Full profile:** https://patentbrief.org/inventor/james-d-barnes

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_Source: PatentBrief — https://patentbrief.org. Plain-English explanations of US patents._