×

Security marking and security mark

  • US 7,513,437 B2
  • Filed: 01/07/2008
  • Issued: 04/07/2009
  • Est. Priority Date: 01/15/2004
  • Status: Expired due to Fees
First Claim
Patent Images

1. A gaming card having a security feature incorporated therein, said gaming card comprising:

  • a gaming card; and

    a conductive material comprising carbon nanotubes located on said gaming card, said conductive material being formed as a patterned layer comprising identifying indicia;

    wherein said patterned layer of identifying indicia is contactable by and readable by a conductivity meter to provide a resistance value of at least a portion of said identifying indicia to impart a security feature to said gaming card.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×