Desk top calculator

Details Desk top calculator Desk top calculator

1995-05-17

1996-05-07

Douglas, Alan P.

Printing and office machinery

Typewriter or calculator

Calculator

D18 6

Patent

active

D03696162

REFERENCES:
patent: D261528 (1981-10-01), Sakai et al.
patent: D286056 (1986-10-01), Kikuchi et al.
patent: D291450 (1987-08-01), Gubbe et al.
patent: D299251 (1989-01-01), Endo et al.
patent: D309748 (1990-08-01), Kobayashi
Ericsson Flyer; Sep. 13, 1985; Ericsson 2104 Calculator.
Hong Kong Enterprise; Mar. 1987; p. 254; Bistec Calculator top of page.

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