Speaker apparatus

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

Reexamination Certificate

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Details

C381S345000, C381S165000

Reexamination Certificate

active

07388963

ABSTRACT:
A speaker apparatus includes a speaker, and a circuit to operate the speaker. The speaker apparatus further includes a speaker box having an opening to enclose a back of the speaker; a casing accommodating the speaker box combined with the speaker and the circuit therein, and communicating with an outside so as to dissipate heat from the circuit; and a duct penetrating the casing and the speaker box so as to emit back sound of the speaker. The present invention provides a speaker apparatus, which has high heat-dissipating efficiency, can be manufactured in various designs, and prevents a user from being burned.

REFERENCES:
patent: 3778551 (1973-12-01), Grodinsky
patent: 4210778 (1980-07-01), Sakurai et al.
patent: 5025885 (1991-06-01), Froeschle
patent: 5097513 (1992-03-01), Jordan et al.
patent: 5189706 (1993-02-01), Saeki
patent: 5771302 (1998-06-01), Schindler
patent: 5864100 (1999-01-01), Newman
patent: 5995634 (1999-11-01), Zwolski
patent: 6956956 (2005-10-01), Kuratani et al.
patent: 2002-191093 (2002-07-01), None
patent: 1998-62184 (1998-11-01), None
patent: 2000-16928 (2000-09-01), None
patent: 20-218617 (2001-01-01), None

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