Combined ruler and electronic calculator

Details Combined ruler and electronic calculator Combined ruler and electronic calculator

1982-12-29

1983-10-18

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Combined

D10 71, D10 2, 33483, D1801

Patent

active

D02710250

REFERENCES:
patent: D94464 (1935-02-01), Bausch
patent: D201300 (1965-06-01), Seely
patent: D245109 (1977-07-01), Yoshioka
patent: D251252 (1979-03-01), Kamila
patent: D259476 (1981-06-01), Feingold
patent: D264821 (1982-06-01), Henkels
patent: D269353 (1983-06-01), Yokoyama
patent: 1334145 (1920-03-01), Eaton
patent: 4095273 (1978-06-01), Gonzales
patent: 4158229 (1979-06-01), Woo
patent: 4282571 (1981-08-01), Giovannoli
Hong Kong Enterprises-12/81-p. 38-Item #635-Ruler-Pencil Box-Calculator at bottom center.

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