Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic
Reexamination Certificate
2007-03-09
2011-11-15
Nguyen, Tuan (Department: 2614)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Electromagnetic
C381S407000
Reexamination Certificate
active
08059857
ABSTRACT:
A voice coil bobbin, which transmits a motive force from the voice coil wound around the bobbin to a diaphragm, includes a main part, a reinforcement part formed on the surface side of the main part, and a middle part formed between the main part and the reinforcement part and made of a material which has a lower density than the other two parts, preferably a non-woven cloth. Thus, there can be provided with the simple-design, high-rigidity voice coil bobbin with high internal loss and a speaker system capable of high-quality sound reproduction.
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Arent & Fox LLP
Nguyen Tuan
Pioneer Corporation
Tohoku Pioneer Corporation
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