Telephone instrument

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

Patent

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D14 58

Patent

active

D02731088

REFERENCES:
patent: D251844 (1979-05-01), Kramer
patent: D256917 (1980-09-01), DeFilippis et al.
patent: D260643 (1981-09-01), Foggia et al.
patent: D261139 (1981-10-01), Jokobsen
patent: 3243517 (1966-03-01), Miller et al.
patent: 3881071 (1975-04-01), Willis et al.

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