Compact speaker with a protective cover

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

Reexamination Certificate

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Details

C381S189000

Reexamination Certificate

active

10269889

ABSTRACT:
A speaker has a case having a peripheral projection, a magnetic device having a yoke, and a permanent magnet and secured to the case. A diaphragm is secured to the case at the peripheral projection. A protector has an upper plate and a cylindrical holding portion at the periphery of the upper plate. The protector is secured to the case at the cylindrical holding portion.

REFERENCES:
patent: 3614335 (1971-10-01), Dymoke-Bradshaw et al.
patent: 4520237 (1985-05-01), Murakami
patent: 6130952 (2000-10-01), Akino et al.
patent: 6661898 (2003-12-01), Kuwabara
patent: 2003/0044040 (2003-03-01), Lee et al.
patent: 1 295790 (1972-11-01), None
patent: 59 140599 (1984-09-01), None
patent: 05 168093 (1993-07-01), None
patent: 10 224879 (1998-08-01), None
patent: 2000 165987 (2000-06-01), None
patent: 2001 036983 (2001-02-01), None
patent: 2002369287 (2002-12-01), None

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