Ferromagnetic loop

Communications: electrical – Vehicle detectors

Reexamination Certificate

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Details

C340S941000

Reexamination Certificate

active

07015827

ABSTRACT:
A ferromagnetic loop having a footprint characterized by a continuous wire shaped in a serpentine manner to form multiple contiguous polygons within the footprint for detection of moving vehicles. The footprint can be one of a triangle, a square, a rectangle, a rhombus, a parallelogram, an ellipse, or a circle. Similarly, each of the multiple contiguous polygons can be one of a triangle, a square, a rectangle, a rhombus, a parallelogram. Different design configurations for the ferromagnetic loop and methods for making and using the same are disclosed.

REFERENCES:
patent: 3984764 (1976-10-01), Koerner
patent: 4239415 (1980-12-01), Blikken
patent: 5164732 (1992-11-01), Brockelsby et al.
patent: 5614894 (1997-03-01), Stanczyk
patent: 6337640 (2002-01-01), Lees et al.
patent: 6345228 (2002-02-01), Lees et al.
patent: 6380868 (2002-04-01), Hilliard et al.
patent: 6483443 (2002-11-01), Lees et al.
patent: 200058926 (2000-10-01), None
patent: 200058927 (2000-10-01), None

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