Coin-operated telephone apparatus

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

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Details

D14 56, D14 61, D14 62, D14 63

Patent

active

D02871254

REFERENCES:
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patent: D277480 (1985-02-01), Jackwicz et al.
patent: 3365554 (1968-01-01), Brezinski
patent: 3393273 (1968-07-01), Bustos
patent: 3750350 (1973-08-01), Anon
patent: 3752927 (1973-08-01), Bartley et al.
patent: 4179723 (1979-12-01), Spencer

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