Calculator attachment for a tape measurer

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric

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D10 72

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D03518019

REFERENCES:
patent: D276536 (1984-11-01), Siefert
patent: D331254 (1992-11-01), Hiromori
patent: D333831 (1993-03-01), Chen
patent: 5230159 (1993-07-01), Lipsey
Hong Kong Enterprise; Basketcalc, Soccercalc & Basecalc Calculators; May 1986; p. 14.
Hong Kong Enterprise; clock/calculator; Jul. 1988; p. 206.

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