Printing and office machinery – Typewriter or calculator – Element or attachment
Patent
1990-01-12
1991-09-03
Holtje, Nelson C.
Printing and office machinery
Typewriter or calculator
Element or attachment
Patent
active
D03196526
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patent: 3157880 (1964-11-01), Easterly et al.
patent: 3175222 (1965-03-01), Nerwin
Wang, Information System Ribbons, p. 466.
Diablo Supplies, Printer Ribbons for Diablo and Xerox, p. 465.
Holtje Nelson C.
Smith Corona Corporation
Veynar Caron D.
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