Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic
Reexamination Certificate
2007-05-29
2007-05-29
Le, Huyen (Department: 2615)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Electromagnetic
C381S413000, C381S420000
Reexamination Certificate
active
10424436
ABSTRACT:
A loudspeaker of the present invention includes a diaphragm; a voice coil for driving the diaphragm; and a magnetic circuit including a yoke, a magnet provided on the yoke, and an upper plate provided on the magnet, for producing a magnet field that is perpendicular to the voice coil. The upper plate has a surface configuration such that when reflecting sound waves created by the diaphragm, the upper plate diffuses the sound waves.
REFERENCES:
patent: 2974204 (1961-03-01), Supitilov
patent: 3496307 (1970-02-01), Sotome
patent: 4742887 (1988-05-01), Yamagishi
patent: 5157731 (1992-10-01), Mitobe
patent: 6671385 (2003-12-01), Suzuki et al.
patent: 6711269 (2004-03-01), Kobayashi et al.
patent: 6721430 (2004-04-01), Wang
patent: 6740590 (2004-05-01), Yano et al.
patent: 2002/0044671 (2002-04-01), Shimomura et al.
patent: 55-150569 (1980-10-01), None
patent: 56-63194 (1981-05-01), None
patent: 57-4891 (1982-01-01), None
patent: 1-19518 (1982-02-01), None
patent: 63-25826 (1982-04-01), None
patent: 4-8598 (1992-01-01), None
patent: 05-168079 (1993-07-01), None
Le Huyen
ONKYO Corporation
Renner , Otto, Boisselle & Sklar, LLP
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