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Wireless identification tag

  • US 8,149,121 B2
  • Filed: 11/24/2008
  • Issued: 04/03/2012
  • Est. Priority Date: 05/21/2008
  • Status: Expired due to Fees
First Claim
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1. A wireless identification tag mixed in a cement product in the manufacturing procedure thereof in which cement, an aggregate, and water, are mixed, said wireless identification tag comprising:

  • a main body having an antenna portion which can write/read information by radio communication; and

    a protection body covering the main body, wherein a plurality of concave portions are provided on the surface of the protection body,wherein the protection body is formed of an alkali-resistant polyamide resin reinforced with non-magnetic-permeable glass fibers and inorganic fillers,wherein a size of the wireless identification tag is approximately the same as a size of the aggregate,wherein a depth of each of the concave portions is in a range of from approximately 0.2 mm to approximately 0.5 mm; and

    wherein a specific gravity of the wireless identification tag is in a range of from 1.3 to 1.9.

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