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3730693
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3644238
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Patent number 3,644,238
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3621917
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Patent number 3,621,917
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Issue date Nov 23, 1971
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A62 - LIFE-SAVING FIRE-FIGHTING
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3562156
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Patent number 3,562,156
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A62 - LIFE-SAVING FIRE-FIGHTING
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3433654
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Patent number 3,433,654
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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3397971
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Patent number 3,397,971
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C07 - ORGANIC CHEMISTRY
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3313606
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Patent number 3,313,606
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3191394
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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3174550
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B64 - AIRCRAFT AVIATION COSMONAUTICS
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3164620
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C07 - ORGANIC CHEMISTRY
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3146060
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Patent number 3,146,060
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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3056741
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Patent number 3,056,741
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Patent number 2,921,897
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2822238
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2331386
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2327708
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Patent number 2,327,708
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2303050
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A62 - LIFE-SAVING FIRE-FIGHTING
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A62 - LIFE-SAVING FIRE-FIGHTING
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL