Calculator attachment for a tape measurer

Details Calculator attachment for a tape measurer Calculator attachment for a tape measurer

1993-07-01

1994-10-25

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

D10 72

Patent

active

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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