This invention describes a mobile device with a touchscreen that lets you reply to a received text message by writing your response directly on the screen with a stylus. Your handwritten reply is sent as an image over the internet to the original sender's email or instant message. The original sender can then type a text message back to you.
Why it matters: Filed before modern smartphones and rich messaging apps made sending handwritten images trivial. Today's devices and networks easily support this functionality, which was a more specialized integration in 2007.
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