Electronic calculator

Details Electronic calculator Electronic calculator

1994-06-17

1997-04-22

Douglas, Alan P.

Printing and office machinery

Typewriter or calculator

Combined

Patent

active

D03789241

REFERENCES:
patent: D338455 (1993-08-01), Suge
patent: D343187 (1994-01-01), Webb et al.
patent: 5058736 (1991-10-01), Bedol
Hong Kong Ent., Oct. 1991, p. 200, Binder Calc.
Hong Kong Ent., Nov. 1987, p. 114, File Calc.
Hong Kong Ent., Jun. 1991, p. 226, Ruler Calc.
Signatures Brochure, Jan. 1989, Ruler Calc.
Hong Kong Ent., Jul. 1988, p. 410, Ruler Calc.

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