Money validation
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 10, 1998
Grant Date -
N/A
app pub date -
Feb 12, 1996
filing date -
Mar 11, 1994
priority date (Note) -
In Force
status (Latency Note)
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Abstract
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.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
MEI INC | 1301 WILSON DRIVE WEST CHESTER PA 19380 |
International Classification(s)

- 1996 Application Filing Year
- G07D Class
- 68 Applications Filed
- 39 Patents Issued To-Date
- 57.36 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Dillon, Stephen John | Boxford, GB | 3 | 22 |
# of filed Patents : 3 Total Citations : 22 | |||
Furneaux, David Michael | Reading, GB | 8 | 59 |
# of filed Patents : 8 Total Citations : 59 | |||
Steel, Paul Franklin | Wokingham, GB | 4 | 57 |
# of filed Patents : 4 Total Citations : 57 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 13 Citation Count
- G07D Class
- 61.76 % this patent is cited more than
- 27 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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