Adjunct key to a telephone set or similar article

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

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D02775700

REFERENCES:
patent: Re31643 (1984-08-01), Waldman
patent: D206225 (1966-11-01), Collins et al.
patent: D217620 (1970-05-01), Dreyfuss et al.
patent: D223833 (1972-06-01), Dreyfuss et al.
patent: D234405 (1975-02-01), McMahan et al.
patent: 1230643 (1917-06-01), Anderson
patent: 2273530 (1942-02-01), King
patent: 2780677 (1957-02-01), Schaufuss
patent: 3427407 (1969-02-01), Heck et al.
patent: 3601559 (1971-08-01), Hiveline, Jr.
patent: 4337381 (1982-06-01), Stein

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