Diaphragm for speakers

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

Reexamination Certificate

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Details

C381S426000, C381S432000

Reexamination Certificate

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07027609

ABSTRACT:
A diaphragm for a speaker comprises a metal cone2and a paper auxiliary cone4bonded integrally to the center portion of the metal cone2.

REFERENCES:
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patent: 3200900 (1965-08-01), Brittain
patent: 3424873 (1969-01-01), Walsh
patent: 4118605 (1978-10-01), Kobayashi
patent: 4275278 (1981-06-01), Sakurai et al.
patent: 4395597 (1983-07-01), Suzuki et al.
patent: 4478309 (1984-10-01), Kawamura et al.
patent: 5594805 (1997-01-01), Sakamoto et al.
patent: 5933512 (1999-08-01), Tamura
patent: 945 568 (1956-07-01), None
patent: 2 031 634 (1970-11-01), None
patent: 410 778 (1934-05-01), None

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