Patent ID: 7134606
Filing Date: 2006-11-14
Classification: G07C

Abstract:
1. A digital paper identification system comprising: a processor having a memory coupled thereto; a plurality of sheets, each sheet including digital paper of the same or different digital pattern relative to each other, and having a writing surface and a unique identifier formed thereon, the writing surface including a predefined pattern extending throughout the writing surface defining coordinates on the writing surface which are prestored in the memory; the unique identifier being separate and distinct from the predefined pattern extending throughout the writing surface, the unique identifier including a pattern corresponding to at least one identifiable cell of the predefined pattern formed on a specific sheet of the digital paper such that each sheet is identifiable one from the other; a digital pen for communicating with the processor, the digital pen including an ink dispensing tip for marking the writing surface of the digital paper and a camera for capturing images of the markings corresponding to pen strokes made by the digital pen and the predefined pattern on the writing surface associated with the location of the markings, the unique identifier being markable by the digital pen for providing data to identify the marked sheet; the processor configured for communicating with the digital pen and retrieving from the digital pen the data representing the captured images including the predefined pattern on the writing surface and the pen strokes formed on each of the sheets and including means for storing the data representing the unique identifier and the corresponding pen strokes data for each sheet in the memory, and for processing the data representing the pen strokes for each sheet.