Sliding hideaway keyboard

Printing and office machinery – Typewriter or calculator – Element or attachment

Patent

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Details

D14 40, D14 53, D1801, D1402, D1403

Patent

active

D02541955

REFERENCES:
patent: 3940758 (1976-02-01), Margolin
Electronics, 12-11-9175, p. 22, Dana Series 9000, Microprocessing Timer/Counter Keyboard.

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