Combined ruler, calculator and clock

Details Combined ruler, calculator and clock Combined ruler, calculator and clock

1984-04-10

1986-10-14

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Combined

D10 71, D10 2

Patent

active

D02861615

REFERENCES:
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: D264729 (1982-06-01), Kobayashi
patent: D271025 (1983-10-01), Li
patent: D279381 (1985-06-01), Leung
patent: 1334145 (1920-03-01), Eaton
patent: 4158229 (1979-06-01), Woo
patent: 4362393 (1982-12-01), Tissot
Hong Kong Enterprises-12/81, p. 38 item #635-Ruler/Pencil Box/Calculator at bottom-center.

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