Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic
Reexamination Certificate
2008-01-09
2011-11-22
Nguyen, Tuan (Department: 2614)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Electromagnetic
C381S412000
Reexamination Certificate
active
08064631
ABSTRACT:
The invention provides an electroacoustic transducer capable of efficiently carrying out conversion from electric signals to sound or from sound to electric signals at low distortion, which requires no special shape nor processing as a magnet, requires no minute setting of the magnetization direction, and sets a distribution of higher magnetic flux densities for effective action with respect to an electric conductor of an acoustic diaphragm than in a magnet plate magnetized in the radius direction although the production process thereof is remarkably simple as in a magnet plate magnetized in the radius direction.
REFERENCES:
patent: 4315112 (1982-02-01), Hofer
patent: 5425107 (1995-06-01), Bertagni et al.
patent: 7142687 (2006-11-01), Hanada
patent: 35-010420 (1958-03-01), None
patent: 60-093397 (1985-06-01), None
patent: 3612319 (2004-10-01), None
Nguyen Tuan
Sughrue & Mion, PLLC
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