Printing and office machinery – Typewriter or calculator – Calculator
Patent
1987-05-19
1990-08-21
Holtje, Nelson C.
Printing and office machinery
Typewriter or calculator
Calculator
Patent
active
D03100944
REFERENCES:
patent: D235879 (1975-07-01), Kitai
patent: D245108 (1977-07-01), Pemberton
patent: D245370 (1977-08-01), Maeda et al.
patent: 4189912 (1980-02-01), Washizuka et al.
Hong Kong Enterprise; 5/1981; p. 303; Brinlock Abacus 8000.
Aurora Impex Corporation
Holtje Nelson C.
Veynar Caron D.
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