Electronic calculator

Details Electronic calculator Electronic calculator

1992-07-28

1994-08-23

Douglas, Alan P.

Printing and office machinery

Typewriter or calculator

Calculator

D18 2

Patent

active

D03499170

REFERENCES:
patent: D218716 (1970-09-01), Yotsukura
patent: D222265 (1971-10-01), Ishida et al.
patent: D230405 (1974-02-01), Jinbo
patent: D318286 (1991-07-01), Sakaguchi et al.
Best Catalog; 1992/1993; p. 358; #10 Casio 2-Color Heavy-Duty Printing Calculator; bottom right.

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