Here’s some new evidence to support the theory that Amazon is coming out with a (roughly) 10-inch Kindle Fire to compete with Apple’s iPad.

A device that could very well be the larger Amazon tablet has surfaced in a Federal Communications Commission filing, reports Nate Hoffelder of the Digital Reader blog. He notes that the bare drawing in the filing seems to point to a device with a 4:3 screen ratio, vs. a widescreen tablet.

Also, some of the confidential parts of the filing will be made public in December, suggesting that this mystery device will launch in the fall.

Other than that, there aren’t any particularly revealing details in the public aspects of the filing. The application was made under what Hoffelder believes to be an Amazon shell company, named Harpers LLC. The company uses different shell companies to file for device approvals.

Here’s the FCC filing. More on the Digital Reader blog.

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