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B61 - RAILWAYS
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3302985
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B61 - RAILWAYS
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3244461
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B61 - RAILWAYS
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3244460
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Patent number 3,244,460
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B61 - RAILWAYS
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3222111
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B61 - RAILWAYS
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3154354
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Patent number 3,154,354
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B61 - RAILWAYS
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3141709
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B61 - RAILWAYS
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3121595
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B61 - RAILWAYS
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3104919
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Patent number 3,104,919
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B61 - RAILWAYS
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3098682
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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2967742
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Patent number 2,967,742
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Issue date Jan 10, 1961
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B61 - RAILWAYS
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2957733
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Patent number 2,957,733
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B61 - RAILWAYS
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2845310
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Patent number 2,845,310
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B61 - RAILWAYS
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2822224
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B61 - RAILWAYS
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2814537
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Patent number 2,814,537
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B61 - RAILWAYS
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2814536
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Patent number 2,814,536
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B61 - RAILWAYS
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2813764
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Patent number 2,813,764
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B61 - RAILWAYS
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2793088
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B61 - RAILWAYS
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2751266
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B61 - RAILWAYS
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2744474
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B61 - RAILWAYS
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2724346
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Patent number 2,724,346
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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2712480
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Patent number 2,712,480
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Issue date Jul 5, 1955
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B61 - RAILWAYS
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2697015
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B61 - RAILWAYS
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2676854
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Patent number 2,676,854
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B61 - RAILWAYS
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2672381
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Patent number 2,672,381
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B61 - RAILWAYS
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2672382
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Patent number 2,672,382
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B61 - RAILWAYS