Price comparison device

Details Price comparison device Price comparison device

1982-03-29

1988-06-07

Hix, L. T.

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Calculators

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G06G 102

Patent

active

047498463

ABSTRACT:
A card (10) with scales (20, 24, 28) printed thereon for the comparison of dissimilar items. Means (36) are provided for linearly intersecting representative points on two scales (20, 24) and for obtaining desired information from the third scale (28).

REFERENCES:
patent: 450640 (1891-04-01), Smith
patent: 3436012 (1969-04-01), Stephenson
patent: 3760165 (1973-09-01), Marcks
patent: 3815269 (1974-06-01), Roselli

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