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2183493
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Patent number 2,183,493
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Issue date Dec 12, 1939
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A46 - BRUSHWARE
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2109579
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Patent number 2,109,579
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Issue date Mar 1, 1938
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A46 - BRUSHWARE
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2055322
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Patent number 2,055,322
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Issue date Sep 22, 1936
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A46 - BRUSHWARE
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2055321
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Patent number 2,055,321
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Issue date Sep 22, 1936
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A46 - BRUSHWARE
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1953980
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Patent number 1,953,980
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Issue date Apr 10, 1934
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A46 - BRUSHWARE