×

Combined multi-frequency electromagnetic and optical communication system

  • US 20060186204A1
  • Filed: 04/03/2006
  • Published: 08/24/2006
  • Est. Priority Date: 06/28/2004
  • Status: Active Grant
First Claim
Patent Images

1. An electromagnetically readable bar code, comprising:

  • a series of bars and spaces forming a bar code such that the bar code is optically readable by a bar code reader to determine information optically encoded by the bar code; and

    a first resonant structure embedded within at least one bar of the bar code such that the first resonant structure resonates in response to a first frequency; and

    a second resonant structure embedded within at least one bar of the bar code such that the second resonant structure resonates in response to a second frequency which is different than said first frequency.

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