Patent classifications
G
PHYSICS
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G06
COMPUTING OR CALCULATING; COUNTING
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G06G
ANALOGUE COMPUTERS
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1/00
Hand-manipulated computing devices
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G06G1/02
Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales
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G06G1/10
characterised by the graduation
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G06G1/12
logarithmic graduations, e.g. for multiplication
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