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3918168
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Patent number 3,918,168
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Issue date Nov 11, 1975
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F26 - DRYING
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3136611
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Patent number 3,136,611
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Issue date Jun 9, 1964
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F26 - DRYING
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1961314
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Patent number 1,961,314
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Issue date Jun 5, 1934
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F26 - DRYING
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1718542
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Patent number 1,718,542
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Issue date Jun 25, 1929
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F26 - DRYING