Switch box for two pairs of stereo system speakers

Equipment for production – distribution – or transformation of ene – Distribution – modification or control – Switch or casing therefor

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D03411281

REFERENCES:
patent: D269610 (1983-07-01), Matsubara
patent: D270153 (1983-08-01), Scholz
patent: D295179 (1988-04-01), Pedinielli et al.
patent: D314185 (1991-01-01), Mazura et al.
Power controller on p. 69 of 1986 South Hills Electronics catalog.
Power center on p. 132 of CompuAdd catalog .COPYRGT.1989.
Curtis power controller on p. 141 of B.A. Pargh catalog, Feb. 12, 1990.
DAK Power controller on the rear cover of Great Presentations catalog, Feb. 12, 1990.

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