Loudspeaker

Recording – communication – or information retrieval equipment – Computer – data processor equipment

Patent

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Details

181199, D1401

Patent

active

D02520257

REFERENCES:
patent: D229066 (1973-11-01), Ekdahl et al.
patent: D235562 (1975-06-01), Robson
patent: D240637 (1976-07-01), O'Neil
patent: 3964571 (1976-06-01), Snell

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