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METHOD AND SYSTEM FOR DIGITAL PEN ASSEMBLY

  • US 20110096043A1
  • Filed: 01/05/2011
  • Published: 04/28/2011
  • Est. Priority Date: 03/23/2005
  • Status: Abandoned Application
First Claim
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1. A receiving unit for receiving an acoustic signal from a digital pen, comprising:

  • at least two ultrasound receivers, for receiving ultrasound signals from the digital pen;

    an electric circuit connected to said ultrasound receivers, and configured to extract ultrasound signals received by said ultrasound receivers, to enable tracking a position of said pen, anda biased clip for holding paper in fixed relationship to said ultrasound receivers, the biased clip comprising a metal clip.

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