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1953153
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H01 - BASIC ELECTRIC ELEMENTS
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1647484
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B61 - RAILWAYS
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1588747
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Patent number 1,588,747
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H01 - BASIC ELECTRIC ELEMENTS
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1487967
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Patent number 1,487,967
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B61 - RAILWAYS
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1447144
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Patent number 1,447,144
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B61 - RAILWAYS
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1399221
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Patent number 1,399,221
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H01 - BASIC ELECTRIC ELEMENTS
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1365215
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Patent number 1,365,215
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B60 - VEHICLES IN GENERAL
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1295400
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Patent number 1,295,400
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B61 - RAILWAYS
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1267998
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Patent number 1,267,998
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1235863
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Patent number 1,235,863
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B60 - VEHICLES IN GENERAL
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1206415
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B61 - RAILWAYS
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1183716
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B61 - RAILWAYS
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1092259
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Patent number 1,092,259
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B61 - RAILWAYS
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1086082
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B61 - RAILWAYS
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B61 - RAILWAYS
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921544
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B61 - RAILWAYS
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891129
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B61 - RAILWAYS
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877747
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Patent number 877,747
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B61 - RAILWAYS
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Patent number 865,904
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B61 - RAILWAYS
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838388
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Patent number 838,388
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831413
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B61 - RAILWAYS
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713593
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540677
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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B61 - RAILWAYS
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466474
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Patent number 466,474
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B61 - RAILWAYS