Diaphragm

Details Diaphragm Diaphragm

1985-10-03

1988-02-23

Fuller, Benjamin R.

Acoustics

Diaphragm

Critically defined material or coating

181168, 4283155, G10K 1300, H04R 702

Patent

active

047264438

ABSTRACT:
A diaphragm using a metal material applied with anodic oxide films, in which said metal material contains one of lead compounds, inorganic metal compounds and phosphor compounds at least to a portion in the micropores of the anodic oxide film.

REFERENCES:
patent: 4230539 (1980-10-01), Saruwatari et al.
patent: 4368107 (1983-01-01), Maejima et al.

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