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

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D14 34, D1401

Patent

active

D02482312

REFERENCES:
patent: D195968 (1963-08-01), Spilman
patent: D243409 (1977-02-01), Eckmann et al.
patent: 3042749 (1962-07-01), Johnson
patent: 4009355 (1977-02-01), Poradowski
Lafayette Electronics, Cat. #750, .COPYRGT. 1974, p. 92, item #8, condenser mike.

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