Telephone instrument

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

Patent

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Details

D14 53, D1403

Patent

active

D02643383

REFERENCES:
patent: D236356 (1975-08-01), Henshaw et al.
patent: D246650 (1977-12-01), Peral-Hernandez
patent: D257772 (1981-01-01), Fukutani
patent: 3217254 (1965-11-01), Hughes et al.

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