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B61 - RAILWAYS
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3194176
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3141420
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B61 - RAILWAYS
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3120741
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B61 - RAILWAYS
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3028819
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Patent number 3,028,819
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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2639888
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B61 - RAILWAYS
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2621892
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B61 - RAILWAYS
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2306208
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Patent number 2,306,208
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B66 - HOISTING LIFTING HAULING
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2188483
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Patent number 2,188,483
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B61 - RAILWAYS
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2060526
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B61 - RAILWAYS
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2039919
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B61 - RAILWAYS
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B61 - RAILWAYS
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B61 - RAILWAYS
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1948123
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B61 - RAILWAYS
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1913792
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Patent number 1,913,792
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B61 - RAILWAYS
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1902658
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B61 - RAILWAYS
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1868809
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B61 - RAILWAYS
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1861070
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B61 - RAILWAYS
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1812603
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B07 - SEPARATING SOLIDS FROM SOLIDS SORTING
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1805388
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Patent number 1,805,388
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B61 - RAILWAYS
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1799185
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1549850
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B61 - RAILWAYS
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1530437
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1518605
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B61 - RAILWAYS
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1483116
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Patent number 1,483,116
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1478627
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B61 - RAILWAYS
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1438818
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B61 - RAILWAYS
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1419023
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B61 - RAILWAYS
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1416755
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B61 - RAILWAYS