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3922138
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Patent number 3,922,138
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Issue date Nov 25, 1975
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F24 - HEATING RANGES VENTILATING
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2229526
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Patent number 2,229,526
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Issue date Jan 21, 1941
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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1954638
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Patent number 1,954,638
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Issue date Apr 10, 1934
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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1497396
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Patent number 1,497,396
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Issue date Jun 10, 1924
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...