Electronic calculator

Details Electronic calculator Electronic calculator

1987-12-30

1990-07-31

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D03096262

REFERENCES:
patent: D258894 (1981-04-01), Kitai
patent: D261005 (1981-09-01), Ichikawa et al.
patent: D269624 (1983-07-01), Sakata
patent: D273201 (1984-03-01), Sakata
W. Bell Catalog; 1986; p. 287; #6-TI-110.

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