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3579168
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Patent number 3,579,168
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H01 - BASIC ELECTRIC ELEMENTS
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3275770
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Patent number 3,275,770
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H01 - BASIC ELECTRIC ELEMENTS
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3017468
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Patent number 3,017,468
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H01 - BASIC ELECTRIC ELEMENTS
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2797329
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Patent number 2,797,329
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H01 - BASIC ELECTRIC ELEMENTS
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2782273
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Patent number 2,782,273
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H01 - BASIC ELECTRIC ELEMENTS
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2666870
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Patent number 2,666,870
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G08 - SIGNALLING
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2650271
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Patent number 2,650,271
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H01 - BASIC ELECTRIC ELEMENTS
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2634377
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Patent number 2,634,377
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H01 - BASIC ELECTRIC ELEMENTS
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2437225
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Patent number 2,437,225
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H01 - BASIC ELECTRIC ELEMENTS
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2342781
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Patent number 2,342,781
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H01 - BASIC ELECTRIC ELEMENTS
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2337205
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Patent number 2,337,205
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H01 - BASIC ELECTRIC ELEMENTS
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2328997
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Patent number 2,328,997
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H01 - BASIC ELECTRIC ELEMENTS
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2219923
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Patent number 2,219,923
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H01 - BASIC ELECTRIC ELEMENTS
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2145468
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H01 - BASIC ELECTRIC ELEMENTS
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2107742
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Patent number 2,107,742
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H01 - BASIC ELECTRIC ELEMENTS
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2043461
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Patent number 2,043,461
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H01 - BASIC ELECTRIC ELEMENTS
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2025235
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Patent number 2,025,235
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H01 - BASIC ELECTRIC ELEMENTS
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2008422
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Patent number 2,008,422
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H01 - BASIC ELECTRIC ELEMENTS
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2000700
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Patent number 2,000,700
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H01 - BASIC ELECTRIC ELEMENTS
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1974960
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Patent number 1,974,960
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H01 - BASIC ELECTRIC ELEMENTS
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1893115
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Patent number 1,893,115
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H01 - BASIC ELECTRIC ELEMENTS
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1680400
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H01 - BASIC ELECTRIC ELEMENTS
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1537796
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Patent number 1,537,796
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H01 - BASIC ELECTRIC ELEMENTS
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1230905
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1140433
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1140432
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1117857
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Patent number 1,117,857
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1095437
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1043274
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER