×

Electronic article surveillance and identification device, system, and method

  • US 6,356,197 B1
  • Filed: 04/03/2000
  • Issued: 03/12/2002
  • Est. Priority Date: 04/03/2000
  • Status: Expired due to Term
First Claim
Patent Images

1. An electronic article surveillance and identification tag, comprising:

  • energy coupling means for receiving transmitted energy and re-radiating said energy, said transmitted energy comprising a first signal at a first frequency and a second signal at a second frequency;

    means for mixing said first and said second signals together forming a sideband signal for re-radiating by said energy coupling means; and

    a controller for switching on and off said means for mixing according to a pre-selected stored data code associated with an article to be identified.

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