Electromagnetic sound producing device

Details Electromagnetic sound producing device Electromagnetic sound producing device

2006-06-13

2006-06-13

Kuntz, Curtis A. (Department: 2614)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S417000, C381S396000, C381S398000

Reexamination Certificate

active

07062062

ABSTRACT:
An electromagnetic sound producing device has a yoke, a coil, a permanent magnet, and a diaphragm provided in a case. The permanent magnet is made of SmFeN-base isotropy plastic magnetic material.

REFERENCES:
patent: 5625700 (1997-04-01), Sone
patent: 6654478 (2003-11-01), Tsuchikiri et al.
patent: 2002/0197512 (2002-12-01), Aizawa et al.
patent: 2000202036 (2000-07-01), None
patent: 0005750 (1997-04-01), None
patent: 12495 (2000-03-01), None

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