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Gathering data concerning publication usage

  • US 7,962,315 B2
  • Filed: 03/18/2005
  • Issued: 06/14/2011
  • Est. Priority Date: 03/19/2004
  • Status: Active Grant
First Claim
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1. A system for producing data concerning usage of a publication by a person, comprising:

  • a piezoelectric element disposed in or on a predetermined portion of a publication and operative to produce as an output electrical energy when deformed; and

    a communication device disposed in or on the publication and responsive to the electrical energy output by the piezoelectric element to communicate data indicating usage of the publication to a data receiver apart from the publication.

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