Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Electromagnetic
Reexamination Certificate
2004-09-07
2008-05-20
Ni, Suhan (Department: 2614)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Electromagnetic
C381S152000, C381S414000, C381S431000
Reexamination Certificate
active
07376240
ABSTRACT:
An electroacoustic transducer comprising a magnetic circuit of a magnetically conductive material with a pair of opposed surfaces defining a gap therebetween, the magnetic circuit comprising a magnet inducing a magnetic field in the gap, the magnet having a surface constituting one of the opposed surfaces. The magnetic circuit further comprises a diaphragm and a coil having electrically conducting paths secured to the diaphragm. The coil has portions of its paths situated in the gap.
REFERENCES:
patent: 1934184 (1933-11-01), Gerlach et al.
patent: 3651283 (1972-03-01), Doschek
patent: 4544805 (1985-10-01), Sawafuji
patent: 5664024 (1997-09-01), Furuta et al.
patent: 6285773 (2001-09-01), Carme et al.
patent: 2766650 (1999-01-01), None
patent: 2 106 750 (1983-04-01), None
patent: 56-137797 (1981-10-01), None
patent: 62-250622 (1987-10-01), None
patent: 57-106298 (1992-07-01), None
patent: 9-139997 (1997-05-01), None
patent: 11-205897 (1999-07-01), None
Search Report for corresponding European Patent Application No. 04076977.0 dated Jan. 24, 2008.
Hansen Kaj Borge
Johannsen Leif
Harness Dickey & Pierce
Ni Suhan
Sonion Horsens A/S
LandOfFree
Coil for an electroacoustic transducer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Coil for an electroacoustic transducer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coil for an electroacoustic transducer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3987372