Speaker device

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic

Reexamination Certificate

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Details

C381S421000, C381S420000

Reexamination Certificate

active

07068807

ABSTRACT:
To realize a speaker device capable of significantly improving sound quality with a simple construction. The speaker device applies electromagnetic force to a voice coil based on a supplied audio signal, and generates a sound wave according to the audio signal by vibrating a vibratory plate fixed to the voice coil.

REFERENCES:
patent: 4661973 (1987-04-01), Takahashi
patent: 5062140 (1991-10-01), Inanaga et al.
patent: 5402503 (1995-03-01), Prokisch
patent: 5461677 (1995-10-01), Raj et al.
patent: 6269168 (2001-07-01), Tagami
patent: 6574346 (2003-06-01), Tanaka
patent: 2005/0105756 (2005-05-01), Kobayashi et al.
patent: 0581129 (1994-02-01), None
patent: 59062299 (1984-04-01), None
patent: 03083496 (1991-04-01), None

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