Keyboard and display unit for an information retrieval device or

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

Patent

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Details

D18 7, D1402, D1801

Patent

active

D02586550

REFERENCES:
patent: D227481 (1973-06-01), Kennedy
patent: D247623 (1978-03-01), Pulvers
patent: D249511 (1978-09-01), Olson
patent: 3973113 (1976-08-01), Goldsamt

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