they did not develop it. Eink of course created the color display. Hanvon developed the device with input from Eink. Hanvon has been creating eink based readers with pen touch for 4 years. they have their own EMR pen and capacitive touch soulutions in house. Hanvon brands the device for Jetbook.
Underneath their firmware layer is Windows CE though and not linux if Im not mistaken. That makes it easier for them to have PDF annotations etc because the libraries are already built for windows when they are not freely available to linux developers
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