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Portable scale
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Patent number 4,785,897
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Issue date Nov 22, 1988
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Albert O. Keinert
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G01 - MEASURING TESTING
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3704442
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Patent number 3,704,442
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Issue date Nov 28, 1972
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G01 - MEASURING TESTING
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1397518
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Patent number 1,397,518
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Issue date Nov 22, 1921
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G01 - MEASURING TESTING
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1397547
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Patent number 1,397,547
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Issue date Nov 22, 1921
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G01 - MEASURING TESTING
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1371371
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Patent number 1,371,371
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Issue date Mar 15, 1921
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G01 - MEASURING TESTING