Printing and office machinery – Typewriter or calculator – Element or attachment
Patent
1978-03-23
1980-02-12
Lucas, Susan J.
Printing and office machinery
Typewriter or calculator
Element or attachment
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.
Genaro Donald M.
Stokes Rembert R.
Sylvester Gordon E.
Bell Telephone Laboratories Incorporated
Lucas Susan J.
Pfeifle Erwin W.
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