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US1891005A
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Method of and means for preventing scaling, corrosion, or like action in metallic bodies
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US1891004A
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Means for preventing scaling and corrosion of metal units
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US1831076A
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Apparatus for purifying water
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US1831075A
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Means of removing scale matter from liquids
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Safety guard for presses
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US1773275A
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Means and apparatus for removing and preventing scale incrustations
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Scale removing and preventing apparatus
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Means and method for preventing scale and incrustation in steam boilers
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Leather-graining machine
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Method of preventing scaling and pitting of steam boilers
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US1508815A
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Thrust bearing
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