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G06G1/105
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ANALOGUE COMPUTERS
G06G1/00
Hand manipulated computing devices
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G06G1/105
linear graduations
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Patent number
9,212,885
Issue date
Dec 15, 2015
Patrick Elie Kattan
G01 - MEASURING TESTING
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2634054
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2,634,054
Issue date
Apr 7, 1953
G06 - COMPUTING CALCULATING COUNTING
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20140215840
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Aug 7, 2014
Patrick Elie Kattan
G01 - MEASURING TESTING