Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic
Reexamination Certificate
2003-05-29
2008-10-28
Kuntz, Curtis (Department: 2614)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Electromagnetic
C381S423000, C442S320000, C428S297400
Reexamination Certificate
active
07443998
ABSTRACT:
A speaker diaphragm which has a high rigidity and can improve sound transmission speed for better sound quality is provided. The speaker diaphragm contains fibers of 3 to 50 mm length mixed in matrix resin. The fibers are oriented radially from center to periphery in surface layers of the diaphragm, while they are oriented in different directions in a middle layer. After setting the resin, these fibers are fixed in the matrix resin with certain tension applied thereto.
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Arent & Fox LLP
Dabney Phylesha L
Kuntz Curtis
Pioneer Corporation
Tohoku Pioneer Corporation
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