Money validation

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United States of America Patent

PATENT NO 5715926
SERIAL NO

08553381

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Apparatus for validating items of value is described. The apparatus includes a measurement circuit including an inductor, the complex impedance of which varies in accordance with the interaction between a test item of value and a magnetic field within which the inductor is located. Circuitry is provided for extracting first and second periodic signals from the measurement circuit, and a circuit is provided for timing the interval between corresponding portions of the first and second periodic signals. A processing element then determines the value of a parameter related to at least one of the real and imaginary parts of said complex impedance, as a measure of the validity of said test item, from the outputs of the timing circuit.

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Patent Owner(s)

Patent OwnerAddress
MEI INC1301 WILSON DRIVE WEST CHESTER PA 19380

International Classification(s)

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  • 1996 Application Filing Year
  • G07D Class
  • 68 Applications Filed
  • 39 Patents Issued To-Date
  • 57.36 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances199619971998199920000255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dillon, Stephen John Boxford, GB 3 22
Furneaux, David Michael Reading, GB 8 59
Steel, Paul Franklin Wokingham, GB 4 57

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Patent Citation Ranking

  • 13 Citation Count
  • G07D Class
  • 61.76 % this patent is cited more than
  • 27 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges2194332101 - 1011 - 2021 - 3031 - 4051 - 60100 +01234567891011121314151617181920

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