Okay, e-reader mavens, it’s time to play Name That Device. Here’s a description of a popular one:

A handheld electronic device comprising: a housing; an electronic paper display disposed in the housing and having a first surface area; and a liquid crystal display (LCD) disposed in the housing proximate the electronic paper display, the LCD having a second surface area that is smaller than the first surface area of the electronic paper display.

Sounds like Barnes & Noble’s Nook, right?

Wrong. It’s a description of a patent applied for by Amazon in 2006, a patent that Amazon never published – until now. And the United States Patent and Trademark Office has just granted the patent to Amazon!

Nilay Patel writing in Engadget calls the revelation “Juicy.”  It could be a lot more than that if Amazon decides to file an infringement claim against B&N.

Patel reminds us that “Barnes & Noble is already involved in a trade secret dispute over the Nook with Spring Design, which claims that B&N saw its Alex reader under NDA [Non-Disclosure Agreement] and then copied it for the Nook.” That case is still pending. (See Who is Alex and Why Is He Suing the Nook People?)

B&N’s patent attorneys are going to have their hands full in the coming months.

Richard Curtis