Biomagnetic field measuring apparatus

Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation

Reexamination Certificate

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C600S511000

Reexamination Certificate

active

10634772

ABSTRACT:
A biomagnetic field measuring apparatus for performing (1) processes for removing a magnetic field waveform generated by a maternal heart from a waveform of a biomagnetic field measured, (2) processes for obtaining a template waveform of a magnetic field waveform generated by the fetal heart from a waveform, from which the magnetic field waveform generated by the maternal heart has been removed, (3) processes for obtaining a waveform of a cross correlation coefficient between the waveform, from which the magnetic field waveform generated by the mother's hears was removed, and the template waveform, and (4) a process for detecting peaks from a waveform of the cross correlation coefficient, and displaying times of appearance of the detected peaks on a display unit.

REFERENCES:
patent: 5372139 (1994-12-01), Holls et al.
patent: 5666959 (1997-09-01), Deans et al.
patent: 6269262 (2001-07-01), Kandori et al.
patent: 6751498 (2004-06-01), Greenberg et al.
patent: 2004/0260169 (2004-12-01), Sternnickel
patent: 63-099840 (1988-05-01), None
patent: 6-237909 (1994-08-01), None
patent: 10-211180 (1998-08-01), None
patent: 11-197128 (1999-07-01), None
patent: 11-318842 (1999-11-01), None
patent: 2001-029320 (2001-02-01), None
American Journal of Obstetrics & Gynecology, vol. 125, No. 8, Aug. 15, 1976, pp. 1115-1120.
Physiol. Meas., vol. 16, 1995, pp. 49-54.

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