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Shielding materials for electromagnetic digitizers

  • US 5,218,173 A
  • Filed: 10/17/1991
  • Issued: 06/08/1993
  • Est. Priority Date: 10/17/1991
  • Status: Expired due to Fees
First Claim
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1. An electromagnetic digitizer, comprising:

  • a sensor grid, anda shield plate disposed under said sensor grid, wherein said shield plate comprises a material with sufficiently high magnetic permeability to increase the magnetic signal in said sensor grid.

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